Every man his own civil engineering and surveyor; a manual in two parts .. (1895)
Casterline, Smith. [from old catalog] · [Hartford City, Ind., E. S. Huffman, printer] · leaf 44
ell seasoned wood,16 inches in diameter and half an inch thick.Put them tog-ether with screws, their graincrossing each other. Then make anotherwheel 3 inches in diameter and 1 inch thick,and fasten it in the center of the other wheel 135) Avith nails or screws. This will be the underside of the… … thin pieces of wood. 1 inch wide and S incheslong-, and make a slit l-.^2 of an inch widethroug-h the middle of each, to within one inch I of each end. These being- for the sights tluvmust be fastened to the (.d^^^- of the wheel or I let in their thickness, so that their slits will (36) be parallel…
Surveying
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