5' Fig. 4. ordinary lantern slide. The objective APPLICATION OF THE 90 DEGREE PRISM. is a one-quarter portrait lens of good quality. For the support of tanks and to all the uses for which a scientific lantern is re- other vessels for projection, the table quired. shown in Fig. 2 is used in place of… … the objective may be inserted in the Fig. 6.-C0TJRSE OF THE RAYS THROUGH quickly arranged as a vertical lantern, and all of the sleeve, /. This arrangement admits of applying a sys- THE ERECTING PRISM. attachments are constructed so that they may be placed tem of lenses for wide-angled crystals. at…
Patents · Adapted · Engine · Scientific American · Munn · Express money · Steam navigation · Electric energy · Rolling bridges · American supplement · Piston rod · Steam engine · Van depoele · Stationary engine
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