Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 459
< IB 1 ll< i< 111 :< i\i (GRAPH. I his in trui from the in!of a solar ray. r ■ 452 PACKING. the observation, as at A in the diagram, fig. 29.c0, or until the ray appears within the double line a!at A, fig. 29S7. In either case, note the hour, minute, and second, when the ray is at A :… … together, and divide by 2 ; the difference between this result and 12 hours will show the error of theclock as compared with solar time, which being corrected by the necessary equations, (of which verycomplete tables are given in the descriptive pamphlet which accompanies the instrument.) will…
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
