 | Robert Grant - 1852 - 686 pages
...be determined, by causing the moveable thread to traverse the interval between the stars, and noting the number of revolutions and parts of a revolution of the screw which were required to effect this object. Auzout first announced his 'improvement of the micrometer... | |
 | Elias Loomis - 1855 - 510 pages
...eye-glass, in such a manner that they may be made to coincide or be separated by the slow motion of a screw. The number of revolutions and parts of a revolution of the screw are indicated by a scale outside of the tube, and this affords a measure of the distance of the spider... | |
 | JOHN R. EASTMAN, B. F. Sands, the hin.secretary of the navy, Coffin, Page, Steedman, Commander J.M. Gilliss, M.F. Maury, M.Narnall, James Major, T.J. Robinson, SIMON NEWCOMB, United States Naval Observatory, William Harkness, james major, u.s.n., lafayette maynard, u.s.n, william b. muse, u.s.n, john rodgers, u.s.n - 1872
...micrometer-screw turned until its threads and their images were coincident as in the preceding case. The number of revolutions and parts of a revolution...positions, and from which the former is derivable. The corrections for accidental errors of graduation given in the table of the volume (II) for 1S46, Introduction,... | |
 | Philip Thomas Main - 1868 - 224 pages
...the position of the micrometer-wire coincides in succession with the positions of the transit-wires, the number of revolutions and parts of a revolution of the screw corresponding to the intervals between consecutive wires is easily determined. Let any two consecutive... | |
 | Simon Newcomb, Edward Singleton Holden - 1881 - 584 pages
...objects A and B, wire 1 (the fixed wire) is placed on A and wire 2 (movable by the screw) is placed on B. The number of revolutions and parts of a revolution of the screw is noted, say 10' • 267 ; then wires 1 and 2 are placed in coincidence, and this zero-reading noted,... | |
 | Jacob William Miller, Charles H. Harlow - 1882 - 326 pages
...has been this question, that the English Admiralty offered a prize for the best invention for telling the number of revolutions and parts of a revolution of the screw per minute. The writer, before closing, feels compelled to. say a word about the log chip and line.... | |
 | Robert Stawell Ball - 1885 - 612 pages
...means of a screw. The distance through which the line has been moved is accurately indicated by noting the number of revolutions and parts of a revolution of the screw. Suppose, then, the two lines be first brought into coincidence, and then moved apart until the apparent... | |
 | William Norman Thomas - 1920 - 554 pages
...micrometer screws until this distance is exactly intercepted by the two wires. The reading ra expresses the number of revolutions and parts of a revolution of the screw and the corresponding movement of the webs through a distance of m multiplied by the pitch, ie mp.... | |
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The number of revolutions and parts of a revolution of the screw is noted, say 10' • 267 ; then wires 1 and 2 are placed in coincidence, and this zero-reading noted, say 5 