the construction of this the gages. A is a tube more than fifty feet in hight terminat- index hand of the dial is left free from any action other than spring. While the corrugations of the disks alone, would ing at its base in a reservoir, B, of mercury. C is an ordinary that of the varying… … has no application in the arts, and is of very the reservoir, K, and on the surface, of the mer- rare occurrence. Some of the salts of ceria are, however, cury in the reservoir, B. plication of pressure, these are supplemented by the flanges, highly prized in medicine. . The spring of which Fig. 4…
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