Sullivan, Christine [Gordon]. [from old catalog] · New York, Cincinnati [etc.] American book company · leaf 32
us equal to its distancefrom F\ the nearest focus, de-scribe an arc. From the otherfocus, 7^, with the transverse axisBC as a radius, cut the arc in Pand S^ and join FF and SF^ cut-ting the curve in O and M. FromA^ through these points O andMy draw the tangents. Fig. 45. Problem 10. — To draw a… … 28 ELEMENTS OF MECHANICAL DRA WING. points F and F. From the given point A^ draw straight lines to thefoci 7^ and 7^, and produce 7^^ beyond the curve to the point J/.Bisect the angle MAF\ This bisecting line is the required tangent. LESSON XII.GEOMETRICAL SOLIDS UNFOLDED. The pupil will draw the…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Sidereus nuncius : magna, longeque admirabilia spectacula pandens, suspiciendaque proponens vnicuique, praesertim verò philosophis, atq[ue] astronomis, quae à Galileo Galileo ... perspicilli nuper à se reperti beneficio sunt obseruata in lunae facie, fixis innumeris, lacteo circulo, stellis nebulosis, apprime verò in quatuor planetis circa Iouis stellam disparibus interuallis, atque periodis, celeritate mirabili circumuolutis; quos, nemini in hanc vsque diem cognitos, nouissimè author depraehendit primus; atque Medicea sidera nuncupandos decreuit (1610)](https://img.insideoutlibrary.com/img/200/ia-sidereusnunciusm00gali-31-11.webp)
