the inner as well coating of paper with emulsion in a liquid state is as the outer face of the body of the diaphragm, there attended with such difficulties as unequal expansion of being preferably a central wide band and two nar- the paper, and the too rapid solidification of the emul- rower bands… … or pressed through canvas, and by means of a stiff BICYCLE TIRE. bristle brush (one about 8 inches broad, similar to the tool used by bookbinders) work the mess as a paper hanger does his paste. By skillful working of the outer bands. Each of the bands has a rib along its brush a coating quite flat…
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