The educational screen (c1922-c1956])

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Bauscb & Lomb Triple Purpose Micro-Projector, the simplest of several models, designedjor teach- ing an entire class with a single slide. A Single Slide Serves Fifty Students Today, thousands of specialists must be trained in all branches of :ience... and they must be trained thoroughly and uickly. This calls for systematic, uniform training... )r the most efficient and eflfective use of available laterials. It's a place where micro-projectors in the ands of competent instructors can save hours of istruction time . . . make slides and microscopes o much further. The B&L Triple Purpose Micro-Projector, shown ere, is an example of the type of teaching tool that i finding such an important place in both civilian nd 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 eflFort. 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 M AMERICAN SCIENTIFIC INSTITUTION PRODUCING OPTICAL GLASS AND INSTRUMENTS FOR MILITARY USE. EDUCATION. RESEARCH, INDUSTRY AND EYESIGHT CORRECTION