High school manual training course in woodwork, including cost of equipment and supplies and studies on trees and wood (1905)
Ritchey, Samuel Edward, 1866- · New York, American Book Company · leaf 166
arating the two parts of the flask. r . »77- ■ -- • . C - ■ . , -. .V - < --- Fig. 293 The line of .separation is not always a straight line orplain, as the sand of the cope often hangs down into thedrag, on account of some depression or hole in the pat-tern. In casting a hollow ring, the cope… … would be rammed up entirely within the drag (Fig. 295).But to get the pattern out, the sand must be lifted
Woodwork (Manual training) · Cabinetwork
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