ern which is adapted to all kinds hinged plate, and receives a split ring provided with a of projection, and which may be readily shifted from one kind of-work to another. It is provided with an shallow internal groove, which fits over a corresponding circumferential rib on the lenscell. This split… … To prevent the escape of stray light a wire frame is slide holder. attached to the body of the lantern, so as to support a The attachments shown in Fig. 2 are Fig. 2.-MICROSCOPE ATTACHMENT. black cloth canopy, which covers the entire front of employed for the projection of micro- the lantern and…
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