Catalogue and price list of Mackey print paoer co. (1897)
Mackey print paper co., Pittsburg, Pa. [from old catalog] · [Pittsburgh?] · leaf 239
MAIN PLATE. … The above is a view of the Main Plate of the F. C. Knight Transit withthe standards off, showing the positions of the verniers and plate levels, thecompass ring and the way it is graduated, and its double row of figures, theinner row figured in quadrants 0 to 90, the outer row 0 to 360. The level…
Drawing instruments
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