Modern carpentry and joinery : being a compilation of the very best things and most modern and practical methods known in the arts of carpentry and joinery (1910)
Hodgson, Frederick Thomas, 1836- · Chicago : F. J. Drake & Co. · leaf 22
. A hori-zontal line cannot therefore have a horizontal trace, as it can-not possibly, even if produced, meet or intersect the horizontalplane; for a similar reason, a vertical line cannot have a ver-tical trace. SOLID GEOMETRY 19 be understood if we imagine a e c to be the plan anda e c the… … Fig. 7. be observed that the two projections (e and e) of thepoint of intersection of the two lines are in a rightline perpendicular to the line of intersection of theplanes of projection. Hence this corollary.—The pro- 20 MODERN CARPENTRY jections of the point of intersections of two lines…
Carpentry
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-215-23.webp)
