ngement being apertures through which passes a bolt for holding the of the experimenter, and at the same time two or three such that when the gate is swung back the spring will halves on the brake shoe and the brake block on the slight twists or wrenches are given. The notch enables be drawn out of… … They are pressed and twisted, as already described, A frame or open casing containing removable adjust- and adhere about as strongly or nearly so asthe others. able shelves and an adjustable and folding brace sup- From a pair of such pieces, 114 inches square, a weight somewhat in the housing, and…
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