Kinematograph year book (1948)

Page scan 000492 from Kinematograph year book

Record Details:

Title:
Kinematograph year book
Date:
1948
Publisher:
London : Kinematograph Publications Ltd.
Volume:
Kinematograph year book (1948)
Leaf #:
000492
Language:
English
Collection:
Year Book and Global Cinema
Format:
Annuals
Contributor:
Library of Congress, MBRS, Moving Image Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Date Added:
June 27, 2024
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470 The Kinematograph Year Book. MEASUREMENT OF SCREEN BRIGHTNESS Mount photometer one-third the height of screen, and take readings at each end, in the centre, and intermediately (five in all). Average of readings gives light intensity in foot-candles ; a recommended figure is from 10 to 14 foot-candles. MISCELLANEOUS FIGURES Standard Electricity Supply (from Grid) : 230v. single-phase or 400v. three-phase, 50 cycles per second. Accumulators : Lead-acid type, 2.6 volts per cell fully charged, specific gravity of electrolyte 1 .280 ; fully discharged 1 .8 volts per cell, specific gravity of electrolyte 1.150. Alkaline type : 1.2 to 1.1 volts per cell. Gas Supply : Meter reading (cubic feet) x declared value in B.T.U.s ~ 100,000 =therms. Recommended Temperature of Auditorium : Winter 55° to 65° F. Summer 10° below outside temperature. Siies Of Posters : Double-crown : 30 in. by 20 in. Quad-crown : 40 in. by 30 in. Foursheet : 60 in. by 40 in., larger sizes proportionately. RUNNING TIME OF FILM Standard speed of 35-mm. sound film ==24 frames per second = 90 ft. per minute == approximately 11 minutes per 1,000 ft. Ft. 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 min. min. min. min. min. h. m. h. m. h. m. h. m. h. m. 0 11 22 331 441 55! 1 6! 1 18 1 29 1 40 100 r 12 231 34! 45! 56! 1 8 1 19 1 30 1 41 200 2 131 241 35! 46! 58 1 9 1 20 1 31 1 42 300 n 141 251 36! 48 59 10 1 21 1 32 1 43! 400 n 151 26| 38 49 1 1 11 1 22 1 33! 1 44! 500 51 16! 28 39 50 1 1 1 12 1 23! 1 34! 1 45! 600 6! 18 29 40 51 1 2 1 13! 1 24! 1 35! 1 46! 700 8 19 30 41 52 1 3! 1 14! 1 25! 1 36! 1 48 800 9 20 31 42 53! 1 4! 1 15! 1 26! 1 38 1 49 900 10 21 32 431 54! 1 5! 1 161 1 28 1 39 1 50