Catalog of stereopticons, motion picture machines, projection apparatus : manufactured and imported by the McIntosh Stereopticon Company . only, for use on either Direct or Alternating Current $ PRICE of above, with No. 1 rheostat Ball hood for either direct or current, net . The Upright form of Hand-feed Arc Lamp is sometimes pre-ferred to the 90 Degree Form, particularly for use where currentgreater than 35 to 40 amperes is to be used. The Upright Arc Lamp is fed by single hand wheel which feedswith a rack and pinion adjustment, both carbons. The same lampcan be


Catalog of stereopticons, motion picture machines, projection apparatus : manufactured and imported by the McIntosh Stereopticon Company . only, for use on either Direct or Alternating Current $ PRICE of above, with No. 1 rheostat Ball hood for either direct or current, net . The Upright form of Hand-feed Arc Lamp is sometimes pre-ferred to the 90 Degree Form, particularly for use where currentgreater than 35 to 40 amperes is to be used. The Upright Arc Lamp is fed by single hand wheel which feedswith a rack and pinion adjustment, both carbons. The same lampcan be used with a different adjustment as illustrated for direct cur-rent and also for alternating current. Using more than 15 amperes of current, the Upright form of ArcLamp works very satisfactorily. It cannot be used with any degreeof satisfaction, attached to the incandescent socket, but requiresspecial wiring, because of the fact that it is necessary to use a heaviercurrent with it than can safely be drawn from the incandescent socket. Mcintosh stereopticon co., Chicago, ill., u. s. a. fii HAND-FEED ARC or Right Angle PRICE, Lamp only, with square base or support as .$ Complete with No. 1 rheostat, square base, or supporting stem tor any of our Lanterns as desired Ball hood, when desired, extra, net The 90° or Right Angle Arc Lamp has one advantage overthe regular up-right form, since the Arc can be kept nearer inline with the center of the lenses for a greater length of timewithout re-adjusting the carbons in the holders, than with theup-right form, since the horizontal carbon is placed in line withthe optical axis and is fed directly towards the center of thecondensing lens, the point of the carbon being the source of light. We offer the above as the most simple and effective RightAngle Lamp on the market. It is very small (size of frame, 4^inches long by 4% inches high) and still has a 234; inch feed toeach carbon. The carbons ca


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