The Nation's Schools, Količina 25Michael Vincent O'Shea McGraw Hill, 1940 |
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Zadetki 1–3 od 79
Stran 9
... better light ... for the Commo- dore gives 85 % of the light from the bare bulb by test of E.T.L .... more light than most indirect fixtures and it is soft ... BETTER 16 WAYS ! 1. BETTER , MORE BRILLIANT PROJECTION. 8 The NATION'S SCHOOLS.
... better light ... for the Commo- dore gives 85 % of the light from the bare bulb by test of E.T.L .... more light than most indirect fixtures and it is soft ... BETTER 16 WAYS ! 1. BETTER , MORE BRILLIANT PROJECTION. 8 The NATION'S SCHOOLS.
Stran 9
Michael Vincent O'Shea. BETTER 16 WAYS ! 1. BETTER , MORE BRILLIANT PROJECTION . This projector uses a specially designed optical system and large objective lens ( f.1.65 ) which provides 10 to 20 % greater screen illumination with 750 ...
Michael Vincent O'Shea. BETTER 16 WAYS ! 1. BETTER , MORE BRILLIANT PROJECTION . This projector uses a specially designed optical system and large objective lens ( f.1.65 ) which provides 10 to 20 % greater screen illumination with 750 ...
Stran 4
Michael Vincent O'Shea. BETTER PLANT PRACTICES 匣 Staff " Get - Togethers " Group meetings for custodians and maintenance engineers held at regular intervals are proving helpful in many communities . They promote better un- derstanding ...
Michael Vincent O'Shea. BETTER PLANT PRACTICES 匣 Staff " Get - Togethers " Group meetings for custodians and maintenance engineers held at regular intervals are proving helpful in many communities . They promote better un- derstanding ...
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activities American auditorium Autosan BAUSCH & LOMB Bell & Howell board of education boiler buses cafeteria catalog cation cent Chicago City classroom clean College color Columbia University committee Company cooperation cost desk Dudley School economic educa Education Association efficient elementary school equipment federal film floor girls grade guidance gymnasium heating interest linoleum lock locker Louis machine Magic Chef maintenance Manufacturing materials ment Mercurochrome modern NATION'S SCHOOLS National NBC Blue NBC Red Ohio Ohio State University operation president principal problems Projector Public Schools pupils RCA Victor rural safety school building school districts school plant school system seating Send serve social sound standards steel superintendent teachers teaching tion tional transportation unit University ventilating vocational Webster-Chicago Write York youth