From: Sellen <apo...@wa...> - 2009-08-31 21:06:04
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, which is 47. degrees. Then reckon that difference vp[~o] the Semi-circle, beginning at (_A_) & so proceed to (_B_;) & at the end of that difference, make a marke with the leter (_E_) vnto which point by your ruler, let a right line be drawne from (_D_) the center of the Semi circle. This being in this sort performed, let the lesser latitude be sought out which in 32 degrees, in the fore said semicircle, beginning your accompt from the point (_E_) and so proceede towards (_B_), and at the end of the lesser latitude let another point be marked out with the letter (_G_), from which point, let there be drawen a perpendicular line which may fall with right Angles vpon the former line drawen from (_D_) to (_E_), and where it chanceth to fall, there marke out a point with the letter (_H_): This being performed let the greater latitude which is 51 degrees 32 minuts, be sought out in the semicircle beginning to reckon from (_A_) towards (_B_) and at the end of that latitude set another point signed out by the letter (_I_) from whence let there be drawen another perpendicular line that may fall with right angles vpon the diameter (_AC_): & here marke out a point with the letter (_K_), this done take with your compasse the distance betwixt (_K_) and (_H_) which distance you must set downe vpon the diameter (_AC_) placeing the one foot of your compasse vpon (_K_) and the other towards the center (_D_) and there marke out a point with the letter (_L_); then with your compasse take the shorter perpendicular line (_GH_,) and apply that widenesse vpon the longer perpendicular line (_IK_,) placing the one foote of your compasse at (_I_,) which is the bounds of the greater latitude, and extend the other towards (_K_), and there make a point at (_M_), then with your compasse take the distance betwixt (_L_) and (_M_), and apply the same to the semicircle. Placing the one foot of your compasse in (_A_) and the other towards (_B_), & there marke out a point with the letter (_N_), now the number of degrees comprehended |