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1 result for "Removing and Installing a Cooling Unit U.S. Office of Education" in Creator.

Title ▼	Year	Creator	Length	Holdings
IPS 283 Removing and Installing a Cooling Unit U.S. Office of Education	1945	Removing and Installing a Cooling Unit U.S. Office of Education	32 frames

Found in catalogs (3)

Educational Screen 1934 — page 30
…The 750 watt lamp with a blower type cooling system insures ample il- lumination, and the built-in type sound unit takes care of…
Business Screen 1939 — page 289
…designed and built to bring the RCA standard professional quality of projection and sound reproduction to the educational and commercial fields. GENERAL OFFICES AND…
Business Screen 1939 — page 288
…1000-watl illumination, biplane bi-post prefocus lamp. (This replaces arc lamp units in business and educational theatre setups of moderate size.) Any size…