Abbildungen der Seite
PDF
EPUB

Plural.

å or is

Ibůs

3

MASCULINES.

below the line b b, and finished with a loop like the elementary

THIRD DECLENSION. stroke in Copy-slip No. 52. This stroke and the various letters

Sign is. into whose composition it enters, one of which is the letter j, in

CASE-ENDINGS.
Copy-slip No. 53, will form the subject of our next lesson.

Cases.
Singular.

Cases,
M. F. or x.

x. and F.
N.
(various)

N.

és LESSONS IN LATIN.-VIII.

G.

is
G. um or ium

um or iurn THE THIRD DECLENSION.

D.

i

D.

Ibüs
Ac.

em

Ac.
és

orix We pass on to the third declension. In the third declension V.

(like the nom.) V.

ēs

å or is we find, in the nominative case, so great a variety of termina- Ab.

8 or i.

Ab.
Thůs

Ibus. tions, that we must endeavour to arrange the nouns in certain classes. The genitive singular, however, is the characteristic stated thus, though the rules are not without exceptions :

The genders of the nouns of the third declension may be case, and it ends in is.

First, nouns ending in o, or, os, er, and imparisyllabics in es, Before classifying these nouns, I must give you some expla- are masculine ; second, nouns ending in as, is, aus, us (gen. nations. Parisyllabic is a word I have to use. It consists of utus or udis) and x, and those which end in s blended with the three words, which I will mark thus

preceding consonant, as well as parisyllabics in es, are feminine; 1 2

third, nouns ending in a, e, c, l, en, ar, ur, ut, and us (gen. pari syl lab(ic);

āris, čris, ŭris), are neuter. By practice you will in time become of these the two latter are of Greek origin. The former is familiar with these somewhat complex facts. Latin. As the word is thus made up of terms from two lan

I proceed to set down specimens in classes. guages, it is a sort of hybrid. No. 2 signifies with; No. 3

CLASS I. signifies to take; the ic is merely the termination. If you put NOUNS WITH CONSONANTAL STEMS ; IMPARISYLLABIC. 2 and 3 together you have syllab, which with the termination

1.-Without the termination s. ble makes syllable. A syllable, then, is so much of sound as may be taken or uttered at once. No. 1 means equal (pari in r and I.

(i.) The stem and the nominative are the same ; stems end found in the English par and pair); parisyllabic, then, signifies that which is equal in its syllables; and nouns are called

Thus : nom. dolor; gen. doloris ; stem, dolor. parisyllabic which have the same number of syllables in all the

EXAMPLES cases of the singular number. I say of the singular number, because the plural of all nouns is not parisyllabic, inasmuch as

Cases.

Singular.

N. the genitive plural, as in the cases of arum and orum, has a

dolor, grief. anser, a goose. vomer, a ploughshare.

G. syllable more than the other cases. Now nouns which have in

doloris, of grief. ansēris, of a goose. voměris, of a ploughshare,

D. the genitive singular a syllable more than they have in the Ac. dolorem, grief.

dolori, to grief. anseri, to a goose. vomeri, to a ploughshare,

anserem, a goose. vomerem, a ploughshare. nominative singular are called imparisyllabic. In this word, as dolor, O grief! anser, O goose ! vomer, O ploughshare! here given, you find an additional syllable, namely, im from in- Ab. dolore, by grief. ansere, by a goose. vomere, by e ploughshare, the n becoming m, before the p—which signifies not. Imperi- Cases.

Plural. syllabic, then, is not-parisyllabic; and the words denote those N. dolores, griefs. anseres, geese. vomeres, ploughshares. nouns which in the genitive singular have not the same number G. dolorum, of griefs. ansorum, of geeso. vomerum, of ploughshara, of syllables as they have in the nominative. Piscis, a fish, is D. doloribus, to griefs. anseribus, to geeso. vomeribus, to ploughshers. parisyllabic; for in the genitive it is piscis, having two syllables Ac. dolores, griefs. anseres, geese, vomeras, ploughshares. as in the nominative. But cantor, a singer, is imparisyllabic,

V. dolores, O griefs! anseres, O geese! vomeres, O ploughshare ! for in the genitive it is cantoris, having three syllables, whereas Ab. doloribus, by griefs. anseribus, by geese. vomeribus, by ploughshares the nominative has but two. Here then we have one distinction--namely, nouns of the third declension are either pari. Cases.

Singular. syllabic or imparisyllabic.

N. guttur, a throat.

calcar, a spur.

animal, an animal. Now, inquiry has shown that parisyllabic nouns have a vowel G.

guttüris, of a throat. calcarts, of a spur. animalis, of an animal, stem, and imparisyllabic nouns a consonant stem; that is, that

D. gutturi, to a throatcalcari, to a spur.

animali, to an animal.

Ac. the stem of the former ends in a vowel, and the stem of the

guttur, a throat,
calcar, a spur.

animal, an animal.

V. guttur, O throat! calcar, O spur! latter ends in a consonant. Of the stem of a noun and a verb Ab.

animal, 0 animal!

gutture, by a throat. calcari, by a spur. I have already said something. It is better to repeat than not

animali, by an animal. Cases.

Plural. to be understood. Take nubes, a cloud, and form the genitive;

N. the genitive is nubis. You get the stem by cutting off the sign

guttura, throats.
calcaria, spurs.

animalia, animal,

G. gutturum, of throats. calcarium, of spurs. animalium, of animals, of the genitive, which in this case is 8 (as in the English cloud, D.

gutturibus, to throats, calcaribus, to spurs. animalibus, to animals. cloud's). You thus obtain nubi. Nubi has two syllables, the Ac.

guttura, throats.
calcaria, spurs.

animalia, animals. same as the nominative nubes. It is therefore parisyllabic, and v. guttura, O throats! calcaria, O spurs ! animalia, o animale! ends in a vowel. Take also dolor, grief; genitive, doloris. Cut Ab. gutturibus, bythroats. calcaribus, by spurs. animalibus, by animals. off is, the sign of the genitive, and you obtain dolor. Dolor Here observe, that as in the neuter nouns of the second deends, you rec, in a consonant, and is a consonantal stem. The clension, the neuter nouns of the third declension have in both word is also imparisyllabic, because it increases in the genitive the singular and the plural three cases alike,-namely, the singular. Imparisyllabic nouns, then, have consonantal stems. nominative, the accusative, and the vocative. În animal

, the In this case the stem and the nominative are the same, both nominative plural is ia, instead of a. This is owing to its being being dolor. But in nomen, a name, genitive nominis, stem originally from a vowel stem-as, nominative, animal; genitive, nomin, the nominative and the stem are unlike. Of consonantal animalis; stem, animali. stems, then, there are two classes: first, those of which the

VOCABULARY. stem is identical with the nominative; second, those in which it is different. The consonants in which the stem terminates Agger, aggěris, m., a Fulgur, fulgàris, 1., Passer, passėris, 11., a

.
lightning.

sparrow. are :

Color, coloris, m., Illi, to him.

Pulvinar, pulvinaris, c.

d.
b. mutes.

colour.
Illis, to them.

n., & couch, 1.

liquids.

Diligo, 3, I love or Mater, matris, f., a Rumor, rumoris, m., the sibilant.

like.
mother,

report. From these stems the nominative is formed with or without Error, erroris, m., Mihi, to me.

Tibi, to thee, the addition of 8. An instance of the formation of the nomina

Nobis, to us.

Vectigal, vectigalis, 11., tive with the addition of s, is found in nom. rex, a king, gen. Frater, fratris, m., Odor, odūris, m., odour, regis, stem reg; add s and you have regs, which is pronounced

a brother.

smell,

Vobis, to you. rer. An instance of the formation of the nominative without OBS.-Est mihi, I have, used with the poun as non, to est; the addition of a you find in nom. leo, a lion, gen. leonis, stem, thus, guttur est mihi, I have a throat; so in the plural, guttura chortened into leo.

sunt nobis (throats are to us), we have throats. In the same way,

NEUTERS.

p. r.

[ocr errors]

8.

error,

a ter.

guttur est tibi (a throat is to thee), thou hast a throat; guttur Thy fathers have wounds. 6. Wounds frighten mothers. 7. Poems

9. I have not a est illi (a throat is to him), he has a throat; guttura sunt vobis flourish in the region. 8. Thou hast a great name. (throats are to you), you have throats; guttura sunt illis (throats pledge. 10. They have an opportunity. 11. The man's opportunity

is great. are to them), they have throats. EXERCISE 25.-LATIN-ENGLISH.

KEY TO EXERCISES IN LESSONS IN LATIN.–VII. 1. Magnus dolor est mihi. 2. Nonne tibi est magnus dolor? 3. Sunt

EXERCISE 21.–LATIN-ENGLISH. magni dolores matribus. 4. Color pulvinaris pulcher est. 5. Estne

1. Good men love good boys. 2. Good boys are loved by good men. pulcher pulvinaris color ? 6. Funestus error est illi. 7. Cur funesti

3. A good boy loves school. errores sunt patri ? 9. Fratribus sunt magni loved. 5. Hast thou a good master ?

4. The good masters of good boys are 8. Frater est mihi.

6. The war is deadly. 7. I dolores. 10. Fulgura terrent animalia. 11. Nonno matres terrent

have a good female friend. 8. The boys are in school, 9. Are folguna ? 12. Fulgura terrent passeres.

not the boys in school? 10. Many foreigners sail into Britain. EXERCISE 26.-ENGLISH-LATIN.

11. The boar of my friend is great. 12. There is play on the river's 1. I have a spur. 2. Hast thou a goose? 3. They have geese. 4.

bank. 13. Scholars love (like) letters. 14. There are frogs on the Have you a mound ? 5. The odour of the lightning is on the cushion. / banks. 15. The goat is great. 16. There are deadly wars in the 6. I do not like taxes. 7. Rumours are troublesome. 8. Have they

island. a couch? 9. They have not a goose. 10. You have a father, a

EXERCISE 22.-ENGLISH-LATIN. brother, and a mother. 11. They have griefs. 12. Thou hast a great 1. Bonos discipulos amo. 2. Boni discipuli a bonis viris amantur, cushion.

3. Amasne amicum ? 4. Aper est mihi.

5. Tibi est caper.

6. Capri (ii.) The stem and the nominative are different; stem in nand r. sunt in ripa. 7. Est in insulâ magnum et funestum bellum. 8. In

Britanniâ sunt agri multi. 9. Funesti sæpe sunt apri? 10. O viri, MASCULINES AND FEMININES.

amatisne pueros ? 11. Amici mei peregrinos non amant. 12. Ludum Cases. Singular,

amant pueri. 13. Amantne pueri ludum ? 14. Estne tibi amica ? N. leo, a lion. homo, a man. pater, a father.

15. Magnus aper non est mihi. 16. Amicæ epistola est in horto. G. leönis, of a lion, hominis, of a man. patris, of a father. D. leoni, to a lion. homini, to a man. patri, to a father.

EXERCISE 23.—LATIN-ENGLISH. Ac. leonem, a lion, hominem, a man. patrem, a father.

1. The horse neighs. 2. The horse's mane is beautiful, 3. The V. leo, O lion !

homo, O man! pater, O father! flies are troublesome. 4. Are the flies troublesome? 5. Good scholars Ab. leone, by a lion. homine, by a man, patre, by a father. are not troublesome. 6. Long wars are troublesome. 7. Horses rum Cases. Plural.

quickly. 8. A man guides the horse. 9. A horse is guided by a man. N. leones, lions. homines, men. patres, fathers.

10. I am delighted by a beautiful horse. 11. The fields are fruitful. G. leopum, of lions. hominum, of men." patrum, of fathers.

12. The herbs of the fields are various. 13. The husbandman commits D. leonibus, to lions. hominibus, to mon. patribus, to fathers.

to the fields grains of corn. 14. The husbandman tills the fields. Ac. leones, lions. homines, men. patres, fathers.

15. How beautifully the fields flourish. 16. Various herbs flourish in V. leones, O lions! homines, O men!

the fields.

patres, O fathers ! Ab. leonibus, by lions. hominibus, by men. patribus, by fathers.

EXERCISE 24.-ENGLISH-LATIN.

1. Fecundus est ager. 2. Suntne agri fecundi ? 3. Bella fecunda NEUTERS.

non sunt. 4. Agri coluntur. 5, Deos colis. 6. Dii coluntur a Cangs. Singular.

Tullio. 7. Equus et equa a viro reguntur. 8. Celeriter currunt apri. N. corpus, a body. nomen, a name, genus, a race.

9. Curruntne capri celeriter ? 10. In pulchro horto sunt muscæ. G. corporis, of a body. nominis, of a name. genéris, of a race.

11. Equum agro committis. 12. Boni discipuli coluntur. 13. O mi D. corpori, to a body. nomini, to a namo. generi, to a race.

fili! diis et deabus committuntur templa. 14. O Antoni ! dii deæque Ac. corpus, « body. nomen, a name. genus, a race.

in templis coluntur. 15. O bone Deus ! in fecundis agris coleris. V. corpus, O body! women, O name!

genus, O rece!

16. Boni viri a filiis et filiabus coluntur.
Ab. corpore, by a body. nomine, by a name. genere, by a race.
Cases,

Plural.
N. corpora, bodies. nomine, names. genera, races.

LESSONS IN DRAWING.–VIII.
G. corporum, of bodia, nominum, of names. generum, of races.
D. corporibus, to bodios, nominibus, to names. generibus, to races. HAVING gone thus far in our instructions for drawing an outline,
Ac, corpora, bodies. nomina, names.

genera, races.

we think it necessary to detain the pupil a little longer upon this V. corpora, O bodies ! nomina, 0 names! genera, o races!

early and most important part of our subject, for reasons that Ab. corporibus, by bodies. nominibus, by names, generibus, by races.

will be apparent as we proceed. So essential is good drawing, In two of the words declined above, corpus, corporis, corpor, that without a correct outline the most laboured performance in and genns, generis, gener, the stems-namely, corpor and gener other respects will be a failure ; it may be very neat in its execu

- seem to end in r. The r, however, is only the representa- tion, carefully shaded, or perhaps cleverly coloured; but if it fail tive of s, for between two vowels, as in corporis, the s by the in the outline by not giving a truthful representation of the form laws of pronunciation passes into r. Thus, instead of corpus, of the object, it is then for all practical purposes useless. We corpčsis, we have corporis, the s being changed into r and the u know what a great temptation it is to the young to begin to into o. Similar changes take place in tellus (tellüsis) telluris, paint, but they do not consider that to be able to paint well the earth ; pulvis, pulvéris, dust; mas, maris, a male; æs, æris, they must be able to draw well. Painting, in its practice—that is, brass ; flos, floris, a flower.

the execution—is nothing more than placing colours, as we have VOCABULARY.

said of lines, in their right places, and the power of handling

the brush successfully depends upon the pupil's ability for Carbo, carbõnis, m., | Littus, littöris, a shore. Pectus, pect/ris, n., a handling the pencil. Of course we make no allusion to the charcoal.

Lumen, luminis, n., breast, Cardo, cardinis, m., a light.

Pignus, pignoris, 11., a

arrangement of colours themselves, their harmony and tones; we lange. Occasio, occasionis, 1., pledge.

moan simply the power of using the brush where it is necessary Carmen, carminis, n., an opportunity. Pulvis, pulveris, m.,

to perfect the form of the object being painted, without having Opus, opěris, n., work. dust,

to lay down the brush to resume the pencil. We wish also to Cinis, cinēris, .m., Ordo, ordinis, m., order, Regio, regionis, f., a warn the pupil against that slovenly, dangerous, and unsatisfac

series.

region or district. tory manner of drawing which is generally termed sketching, Decas, decoris, n., Pavo, pavonis, m., a Vulnus, vulneris, n., | that is, producing a hurried, careless outline, its correctness becomingness. peacock.

a wound.

being the last thing considered. Sketching, with an imperfect EXERCISE 27.-LATIN-ENGLISH.

power of drawing, in the majority of cases amounts to nothing 1. Carbonem timeo. 2. Pavones ferit puer. 3. Pulchræ sunt more than scribbling; there may be thousands of individuals regiones. 4. Occasio est tibi. 5. Movemus cineres. 6. Cardo move- who can sketch, but amongst these there are comparatively

7. Ordinis decus delectat matres. 8. Magnus est pulvis cineris. few who can draw. The dogs, horses, and ships with which the 9. In littore sunt pavones. 10. Carmina non sunt nobis. 11. Vulnus schoolboy adorns the pages of his dictionary, or the margins of est in pectore. 12. Regionis magnum est lumen. 13. Illi est nomen his exercises, may, on the whole, bear a strong resemblance to tongnum. 14. Pignora non laudantur.

the general character of the class of animals or objects inEXERCISE 28.-ENGLISH-LATIN.

tended; but this is not drawing : it is quite another thing 1. Dost thon fear charcoal ? 2. Why does the mother strike the to give the individuality of these objects : in this is the test of boy? 8. They have no becomingness. 4. Thou hast a wound. 5. ability. It is true that the hand of a master may by a few

a poem.

ashes,

lines express an idea with great force and power, but for a under our notice, to draw which we shall be materially assisted learner to begin the art by sketching is altogether a mistake. , by principles borrowed from geometry. But though we cannot We once heard an eminent landscape painter say that “ sketch. employ compasses to draw the forms of flowers and leaves, ing is the ruin of hundreds of young artists ; it is beginning yet by the practice of geometry we easily associate lines, angles, at the wrong end; let them draw well first and secure the ' and centres with curves, although they are not visible upon the power, then afterwards they may sketch.” Sketches are clever, object. Instruments are usually depended upon for drawing and valuable only when they are done by men who can really i architectural curves, mouldings, and the like, because they must draw well; the unfortunate result of the habit of sketching by be constructed according to received proportions. We propose an inexperienced hand may be compared to that of the very now to place before our readers some examples of architectural objectionable system which compels schoolboys to write out curves, with the rules for constructing them; our reason for pages of Latin or English for punishment. There are many doing so being simply to show the pupil a way of making his by acknowledge in after years that their handwriting was eye familiarwhit the construction of curves on geometrical prin

[merged small][ocr errors][merged small][merged small][merged small][ocr errors][ocr errors][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][ocr errors][merged small][ocr errors]

ist by these "tasks” or “impositions,” and who were ciples. From long experience we have found it to be the case serer able afterwards, with all their efforts, to write well. Let that they always make the best and quickest draughtsmen, tie papil therefore give up all idea of sketching, and seek and do their work with the least labour, who have dipped to drav rell, if he at all hopes to make the art useful for deeply into geometrical drawing and lineal perspective. In their practical parposes, or to secure in its practice a pleasurable practice they have acquired a habit of precision, and have resource in leisure hours.

learnt the means to arrive at it readily, and have become fully There is much to be said upon the advantage to be gained by impressed with its importance; they know the reasons why in - koorledge of geometrical drawing, a branch which depends such and such directions lines must be drawn ; the mind and for its securacy upon the use of compasses, scales, and rulers. the eye have acquired a keener perception of the principles of We have already explained a method of drawing curves by proportion; a feeling for arrangement has grown from the use hand, that is, by previously placing points in the course of the of instruments in geometrical exercises, and then in the end the intended curre, and then drawing the line through these points. hand readily takes up the practice. There are innumerable instances of curves which may be better The curve called the Scotia (Fig. 58).-Let a b and c d be the drawn without the aid of instruments than with them. Leaves two lines between which the curve is to be formed. Draw bd and flowers, for instance, afford an inexhaustible supply of perpendicular to cd, and divide it into three equal parts; curred lines, to copy which we usually depend entirely on the through e draw the line g f parallel to a b; from e, with the egen hand; while there are curves which frequently come ! radius eb, draw the arc b g, and at the same time mark the point f; from , with the radius fg, draw the arc gi; b gi of a little help from geometry; we advise him also to draw all will be the curve required.

[graphic]

these lines of arrangement with a light hand, that they may be The curve called the Cyma Recta (Fig. 59).—Let the curve be more easily effaced when done with. formed between the lines ab and c d ; draw the line b d, and To draw the pear (Fig. 63), we will first draw a line to divide it into five equal parts; mark the second division from b, represent the length or axis, and from this line “offsets” on viz., e; upon b e describe the equilateral triangle bef, and upon each side as shown by dotted lines. The pupil may please hime d describe the equilateral triangle deg; from f, with the self as to the number of these “offsets” and their whereabouts; radias f b, draw the arc b e, and from g, with the radius ge, he will not be long before he finds that such lines are best draw the arc e d; bed will be the curve required.

arranged opposite, and to meet, angles, and the greatest disThe pupil can draw an equilateral triangle upon a given line tance of curvature from the axis. He will then proceed to by the following method. Let a b (Fig. 60) be the line upon draw the outline through the extremities of these offsets, which the triangle is to be described; from a and b as centres, especially observing the kind of line requisite between each with the radius 6 a, describe two arcs intersecting each other point: in some parts the outline is more outwardly curved than in the point c; join c a and cb; the triangle a b c is an equi. in others, in some it is nearly straight, in others the curve lateral triangle. (See Lessons in Geometry, VII., page 209.) is inward. If the pupil will exercise his observation in this

The curve called the Ogee (Fig. 61).—Let it be drawn between way when looking at solids and natural objects, which he can the lines ab and cd; draw d e perpendicular to cd, and divide do at all times, whether he has a pencil in his hand or not, it into four equal parts; through the first from e-namely, h, even when out for a walk, he will be not a little surprised, draw the line h ig parallel to a b, make h i equal to he; draw should he make this his general practice, to find how rapidly he the line k i l parallel to e d, and from i, with the radius i k, will gain confidence and power, and be able to produce truthful

[graphic][subsumed][ocr errors]

draw the semicircle k gl; join l d, and upon it draw the equi- and useful drawings. We will give him another example lateral triangle 1 m d; from m as centre, with the distance (Fig. 64), for which he must arrange the scaffolding himself, md or m l as radius, draw the arc d nl; the line d n l gk with one exception, because it includes a principle which we will be the curve required. By recommending the practice of will merely allude to now, as we shall have better and more geometrical drawing, we only wish to direct the pupil where to frequent opportunities by-and-by to enlarge upon it. The find further assistance in free-hand drawing; we will now show, exceptional assistance we offer in this case, is that of the dotted by a few examples, how these principles may be applied. An line which runs through the centre of the handle of the trowel, oral or egg-shaped figure (Fig. 62) would be very difficult to and passes in a direct course to the point of the blade. We draw, if the boundary line only were to be attempted without may here observe that an implement of this kind, to be really some assistance from geometry; there would be a great deal of useful, ought to be so constructed; and if we look at it with an rubbing oat and alteration before it was finished. Let the pupil artistic eye, the composition of lines which make up this very try the figure in the following manner : first by the help of com- simple subject, must strike any one as being more symmetrical passes, then by hand only. Draw the straight line a b, and than if the handle and the blade had been united at any other divide it into two equal parts in the point d. Through d draw angle. This remark upon so insignificant an object as a garden cde at right angles to a b, and make d c equal to a d or d b. trowel may appear trivial, but it is the principle we contend for, Construct upon a b the equilateral triangle a e b, and take the and which is, in reality, of the greatest importance. It is true point g at one-third of the distance from e to b, and determine ve might have selected a more noble object, but it would not the point f in the same way. Then from the points f, g, draw have better illustrated our meaning, or have made it more the lines f i, g h, perpendicular to a e and eb respectively, and evident, and at the same time have provided the pupil with an make each of them equal to one-half of e f or eg. After this example for his practice more suited to the experience he has at arrangement has been made, draw the semicircle a c b and the present attained as a draughtsman. Nature teaches us this arcs be and a e through h and i. It will be necessary to repeat lesson, and it is evident everywhere that harmony of line it a few times, when the pupil will begin to see the advantage proportion always accompany the greatest utility and stren

[graphic]

=

3679
100

Tod

LESSONS IN ARITHMETIC.—XV.

decimal places as are equal in number to this excess, prefixing

ciphers if necessary. DECIMALS (continued).

If the number of decimal places in the dividend and divisor 10. Division of Decimals.

be equal, the division will be the same as in whole numbers. CASE 1.—Divide 120-3033 by 3.27.

If the number of decimal places in the dividend be less than

the number in the divisor, annex as many ciphers to the dividend 120-3033 = 3.27 = 4288083 = 3% = 1299923 x ruolo

as will make the number equal to the number in the divisor, 3679 is the quotient arising from dividing the dividend by the and then proceed as in whole numbers. divisor as if they were whole numbers, and the denominator 100 12. We subjoin other examples of division of decimals. shows that there must be two decimal places in the quotient. EXAMPLE.—Divide 1 by 10.473, carrying the quotient to 5 These two decimal places arise, as will be seen by the fraction places of decimals.

from the fact of there being two decimal places more in We are at liberty to write 1 thus-1.00000, putting as many the dividend than in the divisor.

ciphers after the decimal point as may be required. Since there CASE 2.-If the number of decimal places in the divisor and are to be 5 decimal places in the quotient, and since there are dividend were the same, the result would be exactly the same 3 in the divisor, we must add 8 ciphers. as if the divisor and dividend were whole numbers. Thus,

10:473) 1.00000000 ( 9548 1203:033 = .327 x 1803 = 3679.

94257 CASE 3.-Suppose that there are more decimal places in the

57430 divisor than in the dividend.

52365 Take, for example, 120303:3 = .327. 120303-3 = .327 = 1203093 · 133 = 2293033 X 100

50650

= 367900. The true* quotient in this example is an integer, but it will not be so in all cases.

87580 It will be better in practice, before commencing the operation, to annex ciphers to the dividend sufficient to make the number of decimal places equal to the number in the divisor, in which

3796 case the result will be exactly the same as if the division had Hence the required answer is .09548, prefixing a cipher in been in whole numbers.

order to get 5 decimal places in the quotient. ADDITIONAL EXAMPLE OF CASE 2.—Divide 411.95 by 1.25. 13. EXAMPLE.—Divide 8 by .00002.

Annexing 4 ciphers to :8, since there are 5 decimal places in 1.25 ) 411.95,00 ( 329-56 375

the divisor, we have

*00002) 80000 ( 40000

80000

1203033

1000

• 321

=1903033

1000

41892

83784

250

the division by the rule being, in fact, the same as that of 1195

80000 by 2. 1125

14. It will be observed that we are not required in some

cases to find more than a certain number of figures of the 700

quotient when it is a decimal. Sometimes, by continuing the 625

division far enough, we shall find that there is no remainder 750

i.e., that the quotient can exactly be found in the form of a 750

decimal. But if by continually dividing we cannot arrive at & stage where there is no remainder, then we can only get what is

termed an approximation to the result. The more figures of the Dividing as in whole numbers, we get a quotient 329, and a quotient we take, the nearer we shall be to the value of the remainder 70. Now annex ciphers to the dividend, which will

true quotient. not alter its value, and continue the division. We now find

Thus, in the division above performed in Art. 12, if we that the true quotient is 329-56.

stopped at four decimal places in the quotient, the result would ADDITIONAL EXAMPLE OF CASE 3.—To divido 356-7 by 2:31. that 8 is the next figure of the quotient, and therefore this 8

be .0954. Carrying on the operation one step further, we see Annexing a cipher to 356-7 before commencing the operation, meaning raiso-we are nearer to the true quotient by mo we have 2-31 ) 356-70 ( 154

Where we are required to find a quotient to a given number of 231

places, it is customary to carry on the division to one place

more than is actually required, in order to see whether the next 1257

figure is greater or less than 5. If it is greater than 5, then we 1155

shall be nearer to the true result if we increase the last figure

of the required number of places by unity. 1020

Thus, in the case above given, finding that the fifth decimal 924

place is 8, the quotient to four decimal places will be more 96

accurately written ·0955 than ·0954, because .0955—or, what is

the same thing, *09550—is nearer to .09548 than 09540 is. The part of the trae quotient already obtained is an integer, Now .09550 is Poito more than ·09548 ; whereas ·09540 is our the Gris being in fact the same as that of If more less than ·09548. cipiters be amnezed to the dividend, we shall get decimal places The same method is applied whenever a limited number of the gastent, and the more we obtain the nearer to the true decimals is employed. We shall return to this subject hereafter. quotient shall we arrive. 11. Tiems examples will sufficiently illustrate and explain the

EXERCISE 33.

1. Find the quotients of the following examples in division of Bade for the Division of Decimals.

decimals : Da sitae divisor and dividend were whole numbers.

1. 5.64 + 4.

10. 4.32067 • .001. 19. 684234-6 = 2682. toe saber o decimal places in the dividend exceed the

11. 167342 • *002. 20. 7.231068 – 12. er is the divisse, cat off from the quotient as many

[graphic]

13. 4 + +00001.

22. 6 0000001.

5. 1.658 — 25. 14. 018769 = '0000137. 23, 8 - 0000002. the expresion trus quotient to indicate the total

15. 67284 + 85.

24. 6541.234567 — 21. by the dirison of one number by another, thus distin. 7. 00033 + 011. 16. 73-8243 + .061, 25. 7461.30765 - 112. the quotient defined in Lesson V., Art. 1 (page 69),

8. 236-041 + 1.75. 17. 300002 - 12.1. 26. 325-67543 - 20-12. integral part arising from a division.

9. 60.0001 + 1.01. 18. .00006 *003. 27. 2186-054 -993.

2. 5.64 4.
3. 5.64 + 04.
4. 46.84 – 79.

12. 000045 – 9.

21. 26.3845 125.

6. 4.00334 + 6.31.

« ZurückWeiter »