y above the bar, A, is a bracket which is bolted to There are certain sources of power which have a any point desired. It will be noted that the vanes of the under side of the floor. A socket piece adapted to very limited value, chiefly because of their intermit- the wings, #, are formed with… … trated by full lines. Mount- ed to slide vertically in the end of lever, H, is a pinch-block, D, which pro-
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