The elements of natural and experimental philosophy .. (1834)
Phillips, R. (Richard), Sir, 1767-1840, Smith, E. A · New York, M'Elrath, Bangs & Herbert · leaf 192
R0N03IY. 189 a conical piece is adapted by means of a brass piece O, into thisthe agate cap, as it is called, is fastened. The apex of the hollowcap rests upon the point of a pin F. which is fixed in the cenLreof the box, and upon which the needle being properly balanced,turns very nimbly. lllus.… … within a square wooden box B, Fig. 70, by means of two con-centric circles, called gambols, so fixed by cross axes, a, a, a, a,Fig. 69, to the two boxes, that the inner one, or compass-box,shall retain a horizontal position in all motions of a ship, whilstthe outer or square box is fixed, with…
Physics
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
