Catalog of stereopticons, motion picture machines, projection apparatus : manufactured and imported by the McIntosh Stereopticon Company . n 40 ft. from!he .?creen. For use in connection with it, we recommend the halfsize or 2% diameter objective lens, rather than the yx sizewhich is l^/i^ diameter. With the 500-watt lamp, which can be fitted to most ofour lanterns, but which is much larger than the 250-wattlamp, a 10 ft. picture can be projected up to a distance of 50ft. from the screen. For use at a reasonable distance from the screen, theselamps are very desirable as they require no attenti
Catalog of stereopticons, motion picture machines, projection apparatus : manufactured and imported by the McIntosh Stereopticon Company . n 40 ft. from!he .?creen. For use in connection with it, we recommend the halfsize or 2% diameter objective lens, rather than the yx sizewhich is l^/i^ diameter. With the 500-watt lamp, which can be fitted to most ofour lanterns, but which is much larger than the 250-wattlamp, a 10 ft. picture can be projected up to a distance of 50ft. from the screen. For use at a reasonable distance from the screen, theselamps are very desirable as they require no attention wdiat-ever in operation; simply turn on the switch and they light,just like any ordinary incandescent lamp; when you are thru,turn ofit the switch and there is no further attention requiredio the lamp. Also they do not require anv attention in operation, suchas feeding the carbons, etc. Either of these lamps can beattached, with perfect safety, to the ordinary incandescentsocket. These lamps are tested before being shipped and cannotbe returned. 56 MoINTOSH STEREOrTICON CO., CHICAGO, ILL., U. S. A. IMPERIAL ACETYLENE Dimensions: Height 19 in., Diameter 8i in., Weight 10 lbs. Price 01 Imperial Generator Price of Carbide in 10 lb. tin cans The Imperial has the following points of superiority. 1st. It is very simple in construction, easy to understand, and perfectly safe tooperate. 2nd. The generation and pressure of the gas is at all times under the control ofthe operator. Generation can be increased, diminished or stopped at will by merelyturning the knob (A) at the top of the long screw to the right or left, the operationeither lowering or raising the entire gas container (C) and the enclosed Carbide basket(D) in the water. 3rd. Ordinary lump Carbide is used, which is easily obtained, instead of Carbideof special crush or size being required, as in some generators. 4th. Amnle surface is provided for the condensation of moisttire and cooling ofthe gas i
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