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

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70S RICHARDSON'S BLUEBOOK OF PROJECTION DECIMAL 1/64 015625 1/32...... .03125 3/64 046875 1/16 0625 5/64 078125 3/32 09375 7/64 109375 1/8 125 9/64 140625 5/32 15625 11/64 171875 3/16 1875 13/64 203125 7/32 21875 15/64 234375 1/4 25 17/64 265625 9/32 28125 19/64 296875 5/16 3125 21/64 328125 11/32 34375 23/64 .359375 3/8 375 25/64 390625 13/32 40625 27/64 421875 7/16 4375 29/64 453125 15/32 46875 31/64 484375 1/2 5 EQUIVALENTS 33/64 515625 17/32 53125 35/64 546875 9/16 5625 37/64 578125 19/32 59375 39/64 609375 5/8 625 41/64 640625 21/32 65625 43/64...... .671875 11/16 6875 45/64 703125 23/32 71875 47/64 734375 3/4 75 49/64 765625 25/32 78125 51/64 796875 13/16 8125 53/64 828125 27/32 84375 55/64 859375 7/8 875 57/64 890625 29/32 90625 59/64 921875 15/16 9375 61/64 953125 31/32 96875 63/64 984375 1 1. GEOMETRIC CONSTANTS Circumference Circumference Radius Radius Radius Diameter Diameter Diameter Diameter Area Area Diameter X 3.1416 Radius X 6.2832 Circumference -r 6.2832 VArea -f 3.1416 VArea X 0.5642 Circumference -4 3.1416 Circumference X 0.3183 VAreaX 1-1284 VArea -^ 0.7854 Square of radius X 3.1416 Square of diameter X 0.7854