Mechanical drawing problems for high schools, normal schools and vocational schools (1918)
Berg, Edward. [from old catalog], Kronquist, Emil F. (Emil Fritjoff), b. 1882 · Peoria, Ill. : The Manual arts press · leaf 120
i. Scale 9=i Title:— ROCKER ARM SCALE DATE NAME Keep Your Tools Clean. The tee-square, scale and triangles become dirty thru use and should be cleaned occa-sionally with warm w^ater and soap. Dirty tools soil the paper and should not be used. PLATE Zl <VI 1 Qho\a/ sectionon a-s here.. … ED3- ■^■ /6 J2 \ ^ BO/=IEi ■
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
