The description and use of the sector, crosse-staffe, and other instruments : with a canon of artificiall Sines and Tangents, and the use thereof in astronomie, navigation, dialling and fortification .. (1636)
Gunter, Edmund, 1581-1626 · London : Printed by William Iones for Iames Bowler · leaf 323
e {hall fbnd. Then,to proportion theftyle vnto the plane, confi-der the length of the horizontal! line 3 and whathoure-lines you would haue to fall on yourplane. For the diftance of any one he ure-line fromthe meridian being knowne, we may findc boththe length of the ftyie and the diftance of… … Suppofe the length of the liorizontall line to be 12 in-ches, and that it were required to put on all the houre-linesfrom 7 in the morning vnto J in the euening. Here wehaue $ houres and 6 inches on either fide the meridian.Wherefore 1 allow 15 gr* for an houre, and extendingthe compares from the…
Astronomy · Puritans
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