The Educational screen (c1922-c1956])

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October, 193 5 Page 241 \ Model KOSB Combined Balopticon for either lan- tern slides or opaque ob- jects. JliXCELLENT as any word description may be, it is susceptible to individual interpretation. The student's impression may not only be adversely indi- vidual but also hazy and incomplete. If you could examine a number of these impressions how many of them would you find accurate and as intend- ed? The answer is obvious! But when lessons are accompanied with Balopticon pictures, every student gets a correct mental image that he understands and remembers. He knows because he has seen! Better grades for the student and greater teaching capacity for the instructor are gained with a B & L Balopticon. These instruments are a necessary part of efficient teaching. Write for details to Bausch & Lomb Optical Co., 688 St. Paul Street, Rochester, N. Y, Bausch & Lomb WE MAKE OUR OWN GLASS TO INSURE STANDARDIZED PRODUCTION FOR yOUR GLASSES, INSIST ON B * L ORTHOGON Le'nSES AND B & L FRAMES