Journal of the Society of Motion Picture Engineers (1930-1949)

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478 INFORMATION FOR AUTHORS per write out revolutions per minute rpm. secant sec second sec. sine sin square root of mean square rms. tangent tan watts per candle wpc. MISCELLANEOUS ITEMS CONCERNING JOURNAL STYLE Papers should preferably be written from the impersonal point of view. For example, it is preferable to write: "The amplitude is varied by the use of the potentiometer — " rather than "you vary the amplitude — " or "I vary the amplitude — ." The indefinite use of "we" except in papers by joint authors should be avoided. Long introductions not dealing specifically with the subject of the paper should be avoided. Capitalize significant parts in the names of a manufactured product, i. e., Ivory soap. Verify the spelling of all proper nouns. In using numbers, spell out the following: 1. Numbers at the beginning of a sentence. 2. Numbers indicating length of time (i. e., for thirty minutes). 3. Ordinal numbers (i. e., eighth foot, tenth day). 4. Common fractions (three-fourths, half, etc.) if easily expressed in words. 5. Numbers in reading matter of less than three digits. Use figures for: 1. Numbers of three or more digits except at the beginning of a sentence. 2. Temperatures, weights, lengths, areas, capacities, percentages, ratios, etc. 3. Dates either in ordinal or cardinal style (i. e., July 15, 1920) or (on the 15th of July). 4. Cardinal numbers indicating serial position (i. e., page 321, Fig.5,efc.). 5. Sums of money.