uglish by refraction to a horizontal direction by the coupled prisms studs on the latter in the undercut sockets of the former. Mechanic, designed to facilitate in this way the diagnosis of about to be described, and seen in Figs. 4 and 6, whence, An improved apparatus for the water packing of… … 1, which terminates rying a water tank in theeyepiece at L, and heater and suit- prisms are employ- ableconducting and ed in the bend at Li. delivering pipes, Fig. 4 shows the ar- whereby the water rangement of these may be heated and prisms, which are the hot water de- coupled immovably livered…
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