A practical course in mechanical drawing for individual study and shop classes, trade and high schools (1912)
Willard, William Franklin, 1879- · Chicago : Popular mechanics company · leaf 97
manila or bristol paper to the metal by pricking pointswith a sharp punch along the contour of the pattern,due allowance being made for lap and seam. Thedouble edge shown on the development of the quartmeasure is for the lock seam shown at A, Fig. lOO. 94 A PRACTICAL COURSE IN PARALLEL METHOD… … Fig:. 96 elevation, also sectional view, as at A. The width ofthe section and base is the same as the depth of theprism transferred from the plan view. In the layoutthe various heights of the linear elements of the prismare laid ofif on corresponding parallels in a straight line,equal in length to…
Mechanical drawing
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-68-46.webp)
