File:A manual of elementary geometrical drawing, involving three dimensions. Designed for use in high schools, academies, engineering schools, etc. - and for the self-instruction of inventors,artizans, (14579195158).jpg

Identifier: manualofelementa01warr (find matches)
Title: A manual of elementary geometrical drawing, involving three dimensions. Designed for use in high schools, academies, engineering schools, etc. : and for the self-instruction of inventors,artizans, etc. ... In five divisions ..
Year: 1867 (1860s)
Authors: Warren, S. Edward (Samuel Edward), 1831-1909
Subjects: Geometrical drawing Mechanical drawing
Publisher: New York : J. Wiley and son
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
!^ of shadow, draw a ray,MC, Fig. 128, intersecting the iipper edge of the pedestal at C,which is therefore one projection of the shadow of the point MM.The other projection, m, of the same shadow, is at the intersectionof the other projection, Mw?, of the ray, with the other projection,m,Qi\ of the edge of the pedestal. The point of shadow, nn\ castby the point NN, is similarly found, and so is the point oo\ cast bythe point 00 of the front right hand edge of the tower. Makemm — no\ and find intermediate points, vv, as rr was found,and the curved shadow on the cylindrical part of the pedestal willthen be found. 9°. From ?^ and o, vertical lines are the shadows of oppositediagonal edges of the tower, on the vertical face of the mainpedestal.
Text Appearing After Image:
WOODEN STRTJCTUEES. 113 10. This flat topped tower also casts a shadow on the side of theroofed tower. The right back corner, H—^I, of the top, casts theshadow hh on the side of the roofed tower, through which theshadow line, hx is drawn, parallel to the line H—Hl which castsit. The right hand top line, I—IH, being perpendicular to theplane of the sides of this tower, casts the shadow hi upon it,parallel to the projection of a ray of light. (162.) This shadow lineis real, only till it leaves the tower at z /—^ being in the plane ofthe side of the tower produced—and it completes all the shadowsvisible in the two elevations. 8 CHAPTER ni. IRON CONSTRUCTIONS. 252. Ex. 6. A Railway Track. PI. XY., Figs. 129-134.Mechanical construction^ &c.—It may be thought an oveisight to style this plate the drawing of a railroad track; but taking thetrack alone, or separate from its various special supports, as bridges,&c., its graphical representation is mainly summed up in that of

Note About Images