Notes on practical mechanical drawing, written for the use of the students in general engineering drawing in the University of Illinois (1907)
Wilson, Victor Tyson, 1864- [from old catalog] · State College, Pa., The author · leaf 67
where the edges of the lines are apt to breakdown and the lines run together. In cases of great danger,every other line or so may be begun late as shown in thefigure and afterwards filled out when the ink dries. In 58 Notes on Practical Mechanical Drawing patching these open spaces set the pen to…
Mechanical drawing
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