Encyclopaedia Perthensis; Or Universal Dictionary of the Arts, Sciences, Literature, &c. Intended to Supersede the Use of Other Books of Reference, Band 16John Brown, 1816 |
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Seite 78
... focus ; and as the fame causes con- tinue to operate during the progress of the fun northward , a vaft train of clouds proceed from S. to N. which are fometimes extended much farther than at other times . Thus for two years fome white ...
... focus ; and as the fame causes con- tinue to operate during the progress of the fun northward , a vaft train of clouds proceed from S. to N. which are fometimes extended much farther than at other times . Thus for two years fome white ...
Seite 321
... focus of each pencil . From this principle he discovered the rea- fon why fome people were short - fighted and others long - fighted ; and why the former are relieved by concave , and the others by convex glaffes . 15. About the fame ...
... focus of each pencil . From this principle he discovered the rea- fon why fome people were short - fighted and others long - fighted ; and why the former are relieved by concave , and the others by convex glaffes . 15. About the fame ...
Seite 322
... focus . The event was as follows : 23. Having chosen a proper and very distinct erect object , whofe diftance was 2588 feet , June 15. O. S. 1708 , in the morning , the barometer being then at 29.74 , and the thermometer at 60 , they ...
... focus . The event was as follows : 23. Having chosen a proper and very distinct erect object , whofe diftance was 2588 feet , June 15. O. S. 1708 , in the morning , the barometer being then at 29.74 , and the thermometer at 60 , they ...
Seite 323
... focus will continue to cover the fame mark all the while that the air is cool- ing . 25. The French academicians , being informed of the refult of the above - mentioned experiment , employed M. DELISLE the younger to repeat their former ...
... focus will continue to cover the fame mark all the while that the air is cool- ing . 25. The French academicians , being informed of the refult of the above - mentioned experiment , employed M. DELISLE the younger to repeat their former ...
Seite 326
... focus , the excess of refraction muft evidently be in the convex lens . Alfo , as the con- vex glafs is to refract the moft , it appeared from his experiments , that it must be made of crown glafs , and the concave of white flint glass ...
... focus , the excess of refraction muft evidently be in the convex lens . Alfo , as the con- vex glafs is to refract the moft , it appeared from his experiments , that it must be made of crown glafs , and the concave of white flint glass ...
Häufige Begriffe und Wortgruppen
againſt alfo almoft alſo ancient angle angle of incidence appear becauſe Bocchus body brafs cafe called caufe cauſe centre coaft coins colour confequently confiderable confifts defcribed denarius difcovered diftance Dr Hooke Dryden equal faid fame fays feems feen fent feveral fhadow fhall fhould fide filver fince firft firſt fituated fize fmall focus fome fometimes foon fquare ftate ftill ftone fubftance fubject fuch fuppofed furface Gallienus glafs glaſs himſelf houſe incident rays increaſe inftrument interfection iſland itſelf Jugurtha king laft lefs light likewife meaſure medals miles SW moft moſt motion muft muſt Norway Numidia obferved object occafion oppofite paffing parallel perfon prefent prifm purpoſe reafon reflected refraction reft retina rifes river Roman Ruffia ſeveral Shak ſmall ſpace teleſcope thefe themſelves theſe thofe thoſe tion town of France town of Sweden uſed whofe
Beliebte Passagen
Seite 86 - Farewell! a long farewell, to all my greatness! This is the state of man: today he puts forth The tender leaves of hope; tomorrow blossoms, And bears his blushing honours thick upon him; The third day comes a frost, a killing frost, And when he thinks, good easy man, full surely His greatness is a-ripening, nips his root, And then he falls, as I do.
Seite 44 - The change of motion is proportional to the motive force impressed ; and is made in the direction of the right line in which that force is impressed.
Seite 43 - Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it.
Seite 149 - Vice, for vice is necessary to be shewn, should always disgust.} nor should the graces of gaiety, or the dignity of courage, be so united with it as to reconcile it to the mind. Wherever it appears, it should raise hatred by the malignity of its practices, and contempt by the meanness of its stratagems ; for while it is supported by either parts or spirit, it will be seldom heartily abhorred.
Seite 296 - When any one heareth the word of the kingdom, and understandeth it not, then cometh the wicked one, and catcheth away that which was sown in his heart.
Seite 52 - ... an equal reaction; therefore the planet B will, on the other hand, gravitate towards all the parts of the planet A; and its gravity towards any one part will be to the gravity towards the whole as the matter of the part to the matter of the whole. QED Cor.
Seite 149 - The purpose of these writings is surely not only to show mankind, but to provide that they may be seen hereafter with less hazard ; to teach the means of avoiding the snares which are laid by TREACHERY for INNOCENCE, without infusing any wish for that superiority...
Seite 41 - Absolute, true, and mathematical time, of itself, and from its own nature, flows equably without relation to anything external, and by another name is called duration: relative, apparent, and common time, is some sensible and external (whether accurate or unequable) measure of duration by the means of motion, which is commonly used instead of true time; such as an hour, a day, a month, a year.
Seite 42 - The effects which distinguish absolute from relative motion are the forces of receding from the axis of circular motion. For there are no such forces in a circular motion purely relative, but in a true and absolute circular motion they are greater or less, according to the quantity of the motion.
Seite 149 - If the world be promiscuously described, I cannot see of what use it can be to read the account; or why it may not be as safe to turn the eye immediately upon mankind, as upon a mirror which shows all that presents itself without discrimination.