A hand book of general instruction for mechanics, containing useful rules and memoranda for practical men (1907)
Smith, Franklin Elijah, 1872- · New York, D. Van Nostrand company · leaf 236
le. What is thefull length around andacross the base of anarched piece of metal likeFigure 37. The archequals \ circle. Divide circumference of CIRCULAR MEASURE 223 circle, whose radius is 3 inches (diameter 6 inches) by 2,to which add 6 inches (distance across base). Thus 3.1416 X 6 + 6 = 15.4248… … Fig. 38 3.1416 X 4 = 12.5664 feet, outside circumference3.1416 X 2.5 = 7.85400 feet, inside circumference4 — 2.5 = 1.5 -T- 2 =.75 feet, width of ring. Ans. Example. The circumference ofa flange is 60 inches and in it thereare a number of holes 4 inches fromthe outside of flange to center ofholes.…
Mechanics · Arithmetic · Measurement
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