Anthony, Gardner Chace, 1856- [from old catalog], Ashley, George Francis, [from old catalog] joint author · Boston, D. C. Heath & co. · leaf 26
a r K \ \ \ 1 1 11 1 I1 1 1 ;^ 1 11 z^ ! Kl\ Fig. 19 I p/. I I I Fig. 21 … 10 DESCRIPTIVE GEOMETRY 14. If two lines intersect in space, theyhave one point in common; hence, the projec-tions of the lines will intersect each other inthe projections of the j^oint, as at a^ and a*,Fig§. 24 and 25. If the projections of thelines do not intersect on a common perpendicu-lar to…
Geometry, Descriptive
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![An illustration from Essai de physique, par Mr. Pierre van Musschenbroek ... avec une description de nouvelles sortes de machines pneumatiques, et un recueil d'expériences par Mr. J. v[an] M[usschenbroek] Traduit du hollandois par Mr. Pierre Massuet .. (1751)](https://img.insideoutlibrary.com/img/200/ia-essaidephysiquep01muss-130-38.webp)
