F. H. Richardson's bluebook of projection (1935)

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1935
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
000723
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
March 21, 2024
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MATHEMATICAL TERMS 705 To multiply a common fraction by a whole number it is only necessary to multiply the numerator or divide the denominator by the whole number, thus : 1 1X2 1 — X 2 = or else . 2 2 2h-2 In either case the answer is 1. To divide one common fraction by another you merely invert the divisor and proceed as in multiplication, thus : 1 1 1 4 1X4 4 2 ' 4 ~ 2 ' 1 ~2Xl" 2 To divide a common fraction by a whole number it is only necessary to multiply the denominator or divide the numerator by the whole number. Formulas, Symbols and Their Meanings A formula is what corresponds to the stenographer's "shorthand." We can say that area equals length time breadth is a formula. But if it is necessary to do that with a considerable number of formulas they would occupy a lot of space and require too much time and energy in their writing down. We therefore, to avoid this, make them shorter by employing symbols in the place of words. A "symbol" is any sign, mark or letter employed to express or represent some certain thing in a "shorthand" manner. The word area begins with a. We therefore may. with consistency, let a represent (be a symbol for) the word area. In like manner we may use "1" to represent length and "b" for breadth. We may go further, and in common practice we do, use = as the symbol for equals and X as representing times or multiplied by. Our formula, thus symbolized, becomes a = / X b which reads, in words, area equals length multiplied by