The educational screen (c1922-c1956])

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Bausch & Lomb Triple Purpose Micro-Projector, the simplest of several models, designedjor teach- ing an entire slass with a single slide. A Single Slide Serves Fifty Students Today, thousands of specialists must be trained in all branches of science... and they must be trained thoroughly and quickly. This calls for systematic, uniform training . . . for the most efficient and effective use of available materials. It's a place where micro-projectors in the hands of competent instructors can save hours of instruction time . . . make slides and microscopes go much further. The B&L Triple Purpose Micro-Projector, shown here, is an example of the type of teaching tool that is finding such an important place in both civilian and military war training courses. It is another example of the way in which the Bausch & Lomb skill and experience in the manufacture of precision optical instruments for peacetime use are being applied in the war effort. Here again, because of its wartime accomplish- ments, Bausch & Lomb will be able to extend its optical services to peacetime pursuits when Vic- tory is won. For Bausch & Lomb Instruments essential to Victory — priorities govern delivery schedules. BAUSCH & LOMB OPTICAL CO. . ROCHESTER, NEW YORK ESTABLISHED 1853 tanrn^iriM