Motion pictures, 1940-1949

by Library of Congress. Copyright Office

Credits: Manuscripts, Arthur P. Twogood.

© Vocational Guidance Films, Inc.; 1Feb42; MP12716.

ENGINEERING; electronics. Loucks & Norling Studios, c1945. 1 reel each. © Loucks & Norling Studios.

1. The Electron—an Introduction. Appl. author: Jack Norling. © 1Feb45; MP15823.

2. The Diode—Principles and Applications. Appl. author: Jack Norling. © 1Mar45; MP15973.

3. The Triode—Amplification. © 1Jun45; MP367.

4. Principles of Gas-Filled Tubes. © 1Jun45; MP468.

ENGINEERING; flue gas analysis (Orsat apparatus) Audio Productions, c1945. 1 reel, sd.

© Audio Productions; 1Apr45; MP15879.

ENGINEERING; fundamentals of mechanics. Loucks & Norling Studios, c1945. 1 reel each. © Loucks & Norling Studios.