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accuracy accurate adjustment alidade altitude apparatus axis azimuth barometer base base-line bisected bubble centimetres chronometer circle CJ CJ CJ clamp co-ordinates Coast and Geodetic collimation computation contours correction curvature curves desired determined difference direction earth elevation ephemeris equal equation feet formula Geodesy give given graduation hachures height hence horizontal hour angle inches instrument intersection interval kilometres latitude length line of sight located longitude mean measured meridian method metres micrometer millimetres necessary object observed obtained parallel perpendicular plane plane table plumb line pole position probable error radius reading reduced reference refraction represent right ascension scale screw sextant side sidereal signals slope spheroid stadia star station mark streets surface tangent tape telescope temperature theodolite tion topography transit traverse triangulation United States Coast usually vernier wire zenith distance
Page 470 - Schools and Masters of Painting. With an Appendix on the Principal Galleries of Europe. By AG RADCLIFFE. Illustrated.
Page 471 - ... the fluent narrative gives no hint of the conscientious labors, far-reaching, world-wide, vast and yet microscopically minute, that give the strength and value which are felt rather than seen. This is due to the art of presentation. The author's position as a scientific workman we may accept on the abundant testimony of the experts who know the solid worth of his work; his skill as a literary artist we can all appreciate, the charm of his style being self-evident.
Page 473 - A HISTORY OF THE UNITED STATES NAVY, from 1775 to 1894. By EDGAR STANTON MACLAY, AM With Technical Revision by Lieut. ROY C. SMITH, USN In two volumes. With numerous Maps, Diagrams, and Illustrations. 8vo. Cloth.
Page 471 - History written in this picturesque style will tempt the most heedless to read. Prof. McMaster is more than a stylist; he is a student, and his History abounds in evidences of research in quarters not before discovered by the historian.
Page 471 - OF THE PEOPLE OF THE UNITED •*•* STATES, from the Revolution to the Civil War.
Page 471 - Prof. McMaster has more than fulfilled the promises made in his first volumes, and his work is constantly growing better and more valuable as he brings it nearer to our own time. His style is clear, simple, and idiomatic, and there is just enough of the critical spirit in the narrative to guide the reader." — Boston Herald. " Take it all in all, the History promises to be the ideal American history. Not so much given to dates and battles and great events as in the fact that it is like a great panorama...
Page 22 - ... would, under favorable refraction, be just visible from the top of the tripod at A, or be on the same apparent level. If we now add 8 feet to tripod and 8 feet to signal-pole, the visual ray would certainly pass 6 feet above the tangent point, and 20 feet of the pole would be visible from A. II. Elevations required at given distances. — If it is desired to ascertain whether two points in the reconnaissance, estimated to be 44 miles apart, would be visible one from the other...
Page 470 - STORY OF ARCHITECTURE. An Outline of the Styles in all Countries. By CHARLES THOMPSON MATHEWS, Fellow of the American Institute of Architects ; author of " The Renaissance under the Valois,
Page 22 - ... elevations must be at least 278 feet above mean tide, or one 230 feet, and the other 331 feet, etc. This supposes that the intervening country is low, and that the ground at the tangent point is not above the mean surface of the sphere. If the height of the ground at this point should be 200 feet above mean tide, then the natural elevations should be 478, or 430, and 531 feet, etc., in height, and the line barely possible.