| Walter Henry Jeffery - 1921 - 548 σελίδες
...length of belt in feet. * To Find the Approximate Weight of Belts. — Multiply the length of belt, in feet, by the width in inches, and divide the product by 13 for single and 8 for double belt. Rule for Finding Width of Belt When Speed of Belt in Feet per... | |
| William Kent - 1923 - 1076 σελίδες
...- length of the belt in feet. To find the Approximate Weight of Belts. — Multiply the length of b In feet, by the width in inches, and divide the product by 13 for single am for double belt. Relations of the Sizes and Speeds of Driving and Driven Pulleys The... | |
| Herbert John McCaslin - 1923 - 328 σελίδες
...Lumber. — A board foot measures 12 inches by 12 inches by 1 inch. To compute the number of feet in a board, multiply the length in feet by the width in inches by the thickness in inches and divide the product by 12. Lumber is usually sold at a certain price... | |
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