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fanuary, 1942 Page 5 ty/ifS^ (l!S.(^cei/S/ucafm/motion Pfctures ^afh/p to feacA Acclaimed by Educators and Shop Foremen as one of the Greatest Contributions to Shop Training ever made! "^THE STEEL RULE. 475 ft. 16 mm. sound. Cost: $11.37. Subject shows in detail the various forms of steel rule in general use, explains fractional scales and demonstrates correct use. Explanation of blueprint dimensions. Variations in form of depth gages and combination squares. The rule measuring round stock. THE MICROMETER. 525 ft.16mm. sound. Cost: $12.37. subject shows various forms of the micrometer. Ani- mation teaches their reading. Emphasizes necessity for checking against known standards. Outside, inside and depth micrometers demonstrated. Correct reading of barrel and thimble scales shown. FIXED GAGES. 600 ft. 16 mm. _ sound. Cost: $13.87. Subject offers - demonstration of various types of fixed gages in use. Measurement of outside and inside dimensions, to checking internal and external tapers and to measure threads shown. Go-not-go, flush-pin, taper ring and taper plug gages in use. COMPLETE GROUP OF 5 SUBJECTS ON PRECISION MEASUREMENT COSTS $61.95 Total footage 2700 feet—16 mm. Sound- on-film. (Prints may be bought separately) L VERNIER SCALE. 675 ft. 16 mm. sound. Cost: $15.37. a detailed study, largely in animation, of principles of the Vernier scale and its application to precision measurement. Both ten and twenty-five part Vernier scales explained. Vernier micrometer and caliper in use. Extreme closeups for experience in reading. ~1 HEIGHT GAGES AND STANDARD INDICATORS. 425 ft.16 mm. sound. Cost: $8.97. Subject presents funda- mental principles of the Vernier a_ jna i height gage. Various forms of stand- JfyL ilfm^ J ^^'^ indicators. Gage's use to scribe necessary lines for a precision lay-out job on angle plate. Use of standard indicator with gage block to check depth of cut. ALSO AVAILABLE: 5 subjects on the ENGINE LATHE, 5 on the MILLING MACHINE, 3 on the VERTICAL BOR- ING MILL. ORDER NOW! Or send for free litera- ture giving complete description of these and 13 other subjects of which prints are now being delivered! Order from, or address all inquiries to Distributors for , THE UNITED STATES OFFICE OF EDUCATION CASTLE FILMS RCA BLD6. NEW YORK FIELD BLDG. CHICAGO RUSS BLDE. SAN FRANCISCO ADDRESS NEAREST OFFJCE Please send immediately FREE catalogue describing THE UNITED STATES OFFICE OF EDUCATION'S "Teaching Tools For Defense Workers." Name_ Address_ City _State_ ESI