Outfit for projection of lantern slides:
| Metal-base with optical bench, triple collecting lens (adjustable) of 150 mm aperture; large cooling cell; slide carrier with bellows; triple revolving arm, with rack and pinion adjustment | $108.— | |
| Projection objective of 300 mm focal length | $20.— |
(A second objective of same focal length may be slipped over the former, the two combined represent an objective of 150 mm focus. Additional price $20.—.)
Outfit for microscopical projections:
| Cylinder-diaphragm and condenser; objectstage
and small cooler with moveable slide-holder. Objective
carrier with triple nose-piece: rack and
pinion adjustment and micrometer-screw. Broad
tube with Iris-diaphragm into which the smaller
draw-tube fits. Two projection eye-pieces. Object-stage and objective carrier are provided with hinges. Wooden cover with cloth curtain | $84.— | |
| Transport | $250.— | |
| ——— | ||
| Complete outfit | $334.— |
| No. 118. | Megascope, apparatus for the projection of opaque objects; special offers will be made on application. | |
| No. 119. | Attachment for spectroscopic examinations, to be used on the optical bench and in connection with the lamp of the projection apparatus No. 117. Slit mechanism, large triple prism, object-stage | $80.— |
| No. 120. | Large projection apparatus, of special design with latest
improvements, for lantern slides size 13×18 cm, for
micro-projection, and megascope attachment. Special
offers for this apparatus will be made on application. (In ordering it is necessary to state the voltage of the available electric current, also whether it is direct or alternating.) | |
| No. 121. | Trichinoscope. Simple electric lamp (hand feed) of
20 Ampère, mounted on adjustable stand, encased in
Russian iron box, double collecting lens (adjustable)
of 120 mm Aperture, with condensing lens. Mechanical stage for glass compressors, with movements at right angles to each other, cooling cell for the preparation with a continual flow of cold water. Objective carrier with micrometer screw, wide tube with Iris diaphragm | $120.— |
| Projection objective of 35 mm focus, aperture f:3,5, with Iris diaphragm | $18.— | |
| ——— | ||
| $138.— |
