ound the base of the the diaphragm. Thecorrugations are less abrupt in their dome-like ceiling. Its motion is up- curves than concentric ones, which also adds to their dura- ward along the ceiling, and as the bility. Fig. 2 represents this gage with dial removed, and currents meet in the center of… … blocks have commended them to the proprietors of a number diaphragm, A. To this plate is screwed a metallic support, Balanced balloons sent to the top of the ceiling were drawn of the largest mills in the country, andthey have never yet down to the floor, and sought the exhaust openings. White C,…
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