New York (State) University. [from old catalog] · Albany, University of the state of New York · leaf 13
ine diagonal lines, spaced inproportion to the area of the section. (See figure 9) 23 When the object is symmetrical one-half only may be sec-tioned unless the section is small. A section of a symmetricalpiece should be made symmetrical. (See plate 7) 24 Indicate the place at which a section is… … TAP I4-X20 F US Std.
Drawing-room practice · Agricultural machinery · Machine-shop practice
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten15unit-307-176.webp)
