Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 236
celestial bodies to within a third of a degree, and weare informed that Tycho Brahe, by a diagonal scale, wasable to brinff it down to somethino- like ten seconds.Fig. 101 will show what is meant by this. Suppose tliisto be part of the arc of Tychos circle, having on it thedifferent divisions and… … Fig. 101.—Dijius Diajroiial Scale the truth, unless some other method were introduced ;and the method suggested by Diggs, and adopted byTycho, was to have a series of diagonal lines for thedivisions of degrees ; and it is clear that the height ofthe diagonal line measured from the edge of the…
Astronomy · Telescopes
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