Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 459
e suns ray is in contact with the line on which it is intended to make 452 PACKING. the observation, as at A in the diagram, fig. 2986, or until the ray appears Trithin the donble line alat A, fig. 2987. In either case, note the hour, minute, and second, when the ray is at A; leaving the… … together, and divide by 2; the difference between this result and 12 hours will show the error of the clock as compared with solar time, which being corrected by the necessary equations, (of which very complete tables are given in^ the descriptive pamphlet which accompanies the instrument.) will…
Mechanical engineering · Mechanics · Engineering
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
