John Hopkins Press, 1898
CONTENTS.--Vol. I (1897)--Vol. II (1898)--Vol. III (1899)--Vol. IV (1902)--Vol. V (1905)--Vol. VI (1906)--Vol. VII (1908)--Vol. VIII (1909)--Vol. IX (1911)--Vol. X (1918)--Vol. XI (1922)--Vol. XII (1928)--Vol. XIII (1937)--Vol. 14 (1941)
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accuracy amount angles azimuth Baltimore Baltimore county base beds blocks boundary building stones Canal Carroll counties Cecil county Chesapeake Bay Coast and Geodetic Cockeysville color considerable contours Creek cubic Delaware detailed distance drawn east Eastern Shore Ellicott City errors feet feldspar formations Frederick Frederick counties furnished gabbro Garrett counties Geodetic Survey Geologist gneiss grains granite Harford county Herman Howard county inch indicated instrument joints land later latitude limestones marble Maryland Geological Survey material measured method miles minerals Mountain observations obtained operated Peach Bottom Plate points Port Deposit portion Potomac present published quarries quartz railroad region represented Ridge river roads rock sandstone scale sheet sketch slates Smith star station surface Susquehanna telescope territory tests tion topographic traverse triangulation U. S. Geological Survey Virginia Washington weathering weight western
Seite 344 - You must observe if you can, whether the river on which you plant doth spring out of mountains or out of lakes. If it be out of any lake, the passage to the other sea will be more easy, and [it] is like enough, that out of the same lake you shall find some spring which run[s] the contrary way towards the East India Sea...
Seite 302 - The number of angle equations in any figure is equal to the number of closed triangles into which it can be resolved. But since certain of these are a consequence of the others, the number of angle conditions which it is desirable to introduce is less than the number of triangles. The number of angle equations in any figure is equal to the number of closed lines in the figure plus one, minus the mimber of stations.
Seite 392 - A Map of Pensilvania, New-Jersey, New York, And the Three Delaware Counties: By Lewis Evans. MDCCXLIX.
Seite 355 - Relation." which was entered at Stationer's Hall, London, August 13, 1608, under the following title, which differs from the printed one, as it mentions Nelson's name: "A true relation of such occurrences and accidents of note as have happened in Virginia synce the first planting of that Colonye which is nowe resident in the south parte of Virginia till master Nelson's comminge away from them, etc.
Seite 267 - This correction, designated by a, represents the error in the setting of the instrument in the meridian. Its effect is zero at the zenith and increases toward the horizon. Since the instrument is liable to be disturbed during the operation of reversal, it is necessary to determine the azimuth error, both before and after reversal, separately. A comparison of the clock error, determined from observations upon north and south stars, will furnish the data necessary for the determination of azimuth....
Seite 378 - Virginia and Maryland as it is planted and inhabited this present year 1670 surveyed and exactly drawne by the only labour and endeavour of Augustin Herrman, Bohemiensis.
Seite 329 - ... consequently there is more or less generalization. It is therefore impossible to make any map an accurate, faithful picture of the country it represents. Moreover, the smaller the scale the higher must be the degree of generalization, and the further must the map necessarily depart from the original. Now, it is in this matter of generalization that the judgment of the topographer is most severely tested. He must be able to take a broad as well as a detailed view of the country, he must understand...
Seite 320 - A traverse line consists of a series of direction and distance measurements. Each course, as the direction and the accompanying distance are called, depends upon the one immediately preceding it, and a continuous chain is thus formed. Traverse lines are largely used in the topographic work proper for making minor locations.
Seite 358 - A Relation of Maryland; Together with a Map of the Country, The Conditions of Plantation, His Majesties Charter to the Lord Baltemore, translated into English. These bookes are to bee had, at Master William Peasley,' Esq.; his house, on the back-side of Drury Lane, neere the Cock-pit Playhouse; or, in his absence, at Master lohn Morgan's house in high Holbourn, over against the Dolphin, London, September the 8. Anno Pom.