o concern himself is ly modern and greatly improved device has come into gene- by pegs fitting into holes, provided in the first part, to re- represented in Fig. 67. It is called a flask, and is composed ral use. It is termed a snap flask, each part having a hinge ceive-them. The next operation is… … ly ; and as the pattern is made in halves, the top half lifts loosening is accomplished; but it is not well to have recourse ving). The lower part is called the nowel, and the upper to such an expedient, because, wherever the bar passes, the with the sand in the cope. In some cases a screw is fixed…
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