Lukin, James. [from old catalog] · New York, G. P. Putnam's sons · leaf 270
with a broad back,so as to stand upon the surface-plate without being held,which is often very convenient. Sometimes, however,this tool, instead of being of the usual form, is extendedin width on both faces until it becomes like a sheet ofnote-paper opened to a right angle, or a long strip of… … Ficr. 23. 26o BOY ENGINEERS. surface-plates. These are, of course, more costly than theordinary steel square, and the tyro need not buy one; butthe} are very useful in machine manipulation. These wewill illustrate presently, as the next will perhaps hardlybe understood without a sketch. This is the…
Handicraft · Steam-engines
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