The Educational screen (c1922-c1956])

September, 193 5 Page 205 A Combination Projection Unit U'ontiiuied from page 188) sockets for connecting the equipment so that it may he moved very readily from one location to an- other. Another feature of the carriage, although not related to projection, is that the i)rojection icjuipment may be removed and the carriage may be used as a portable demonstration table or as a means of transportation of demonstration or other luipment from one place to another. It has been lound to save a great many steps in this latter capacity. It is possible to carry on the carriage a small screen and shades for darkening windows. By converting the opaque projector for slide pro- jection by the attachment of the slide carrier and lens, the utilit}- of the projector is cut down some- what in that the size of the material to be projected is reduced to the size of lantern slides. However this has its advantages also, inasmuch as the ma- terial may be permanently mounted on stiff cards the same size as slides and are the more easily in- dexed and stored. Also, with an inexpensive pro- jector of this type, the results obtained by using only the center of the projection area are better than when using the entire area. As this opaque projector does not have a mirror so that it will re- produce printed and written matter in its proper BURTON HOLMES FILMS, Inc. inaugurates a "FREE LOAN" SERVICE ''CARNIVAL'' A story of the World's Fair A feature-length 16 mm. sound-on-film subject The McGraws. the Abbotts, the Millers, of Boston, St. Louis and Atlanta in a highly en- tertainins: plot that carries them throuirh a Century of Progress where they meet at the A & P Carnival and enjoy Harry Horlick's and Paul Ash's orchestras, the Marionette Shows. George Rector's cooking:, and other entertainment. RCA "High Fidelity" Recording. Action.' Comedy/ Gaiety.' Music/ BURTON HOLMES FILMS, Inc. ""Lca.t"^^* Aho: Rental Burton Holmes travel subjects to schools. form, it is necessary in making up the cards, to type or write the material with a backing-up carbon paper reproducing the reverse of the material on the back of the sheet, which will appear in its prop- er form on the screen. In order to make the unit more valuable, it is found advisable to make photomicrographs of cer- tain live specimens when they are available. The photograph may then be shown at any time with the opaque projector or a lantern slide may be made and projected by means of the lantern projector. This is often easier than making microscopic slides of the specimens. The photomicrographs may be made by mount- U. S. Navy Selects AMPRO PROJECTORS This Remarkable Equipment Exceeds the m-ost rigid specifications for PERFORMANCE * DURABILITY * ECONOMY! Howing the example of thousands of schools and colleges who buy carefully, the U. S. Navy i selected Ampro precision quality. In fact, it now has 35 Ampro Sound-on-Film projectors m use, delivering brilliant, professional-type service. And each model, like all Ampro equip- ment, is built to give better than standard service for years to come, with a minimum of attention or repair. Test All Makes! And Actually See Why AMPRO Will Please You Better. Before you buy—compare Ampro performance and see what clearer, brighter, better pictures it produces. Test it for ease and quietness of operation .... for smoothness .... for adaptability to your projection conditions .... and for convenience with automatic rewinding. Before you buy—look at the record! It is no accident that so many schools and colleges choose Ampro. It is further proof that in Ampro you will find just the combination of Per- formance, Durability and Economy you desire. Ask your dealer for a demonstration or write today for full details. No obligation. SOUND-ON-FILM —16 mm. projector. Undistorted tone quality on a frequency range from 50 cycles to 7000 cycles. Superior illumination plus aspheric condensing system and a super- fast F 1.65 large-barrelled projection lens give brilliant pictures up to 150 feet. Easy to operate. Price complete $650. Write for details of 25 Ampro points of superiority. SILENT PROJECTORS— 16 mm. Ampro offers two splendid series of silent projectors. One ■for use with 750 watt lamps, the other for 500 watt lamps. Interchangeable with 200, 300 and 400 watt lamps without adiustments. Built with every needed improvement for finest projection such as: finned lamp house for cool operation under all conditions, automatic rewind, reverse action, framer for out of frame prints, inte-changeable lenses and patented kick-back claw movement which spares the film from sprocket hole wear. Priced from $135 with carrying case and all accessories. CHICAGO C IDKUPIDie^lTKID^ 2839-5/ NOHTH WESTCRN AWENUE ILLINOIS