8 MISC. PUBLICATION 225, U. 8S. DEPT. OF AGRICULTURE 
- , . . £ aS y : > . 
Taste 14.—Discharge or flow of water; unit conversion factors, with approximate 
values 
Cubie feet E 
Cubie feet} Gallons | per second; Acre-feet | Miner’s | Liters per Cubic 
per minute] per second | (second- per hour inch ! second HSS DS 
feet) second 
1 0. 124675 0. 01667 0. 001377 0. 667 OLA POS SORES eo ees 
(4s) [Yo] [24] (44) 
8. 02083 1 0. 133581 OFOUIOS: pba teecer 3. 78533 0. 003785 
(8) C79) (140) (334) (4450) 
60 7. 48052 1 | 20.082645 40 28. 3163 0. 028317 
(715) (M2) (28) (736) 
726 G0. 5143 Lt 1 484 342. 627 0. 342636 
(90) (12) (500) (350) %) 
1e5 0. 187013 0. 025 0. 002066 1 O05 707906in oe 
[142] (4) [40] 
2. 11882 0. 264178 0. 035315 OSO0G2Z91Ol2 eeoreneee” 1 3 0. 001 
(2) (44) (440) 
2, 118. 87 264. 170 35. 3145 2EGIS5 oR | Seen 999. 973 1 
(2000) (265) (35) (3) (1000) 
1 Approximate values only; the miner’s inch, used in many Western States to measure water flow, is the 
quantity of water that will pass through an orifice 1 square inch in cross-section under a given head, and 
varies from 1.36 to 1.73 cubic feet per minute. In California the legal standard is 1.5 cubic feet per minute, 
oF the flow through an aperture 2 inches high in a 1.25-inch plank under a 6-inch head above the center of 
the stream. 
2 Or 1.98347 (approximately 2) acre-feet per day. 
3 See footnote 1, table 11. 
TABLE 15.—Approxzimate quantities of forest products represented by 1,000 feet of 
timber board measure (1 M feet b. m.) 
Product Quantity Product Quantity 
Shingles). wk ge ee ee ee 10:.000) |eHenceMostshe 22 =e 2 ae pe 202 
Dey Hic a rs oe te rete an ne oer 5, 000 || Round timber (ratio, 6:1) cubic feet _____ 166. 667 
ETO. Spero erie nhc a 3, 000 || Sawed material (ratio, 12:1) cubic feet ___ 83. 333 
Slack: Sta vesars ss See oe ye eee 3, 000 || Poles (telephone)________________________ 16. 667 
Tight staves-etitiat 2. SRaRR ie | SMeeD & TROOOc | ESteres: Gare) 2 fee 5 ee Ee ee rao 
Slick heading, sets= = eee eee SOO CordSwils 3. o: SS. Se eee 0 
Mechigheagdine. Sets mses sas ee 250 
TABLE 16.—Approximate ! equivalents of forest products 
Cubie 
Cubic feet Board feet Cords meters 
(steres) 
| PORN rere os Eos Es 42) eee Cee We ee ESS Ee: 26 ee eee 0. 0283 
9008. 2 ee ee en 1, 000 2 7. 25 
00 452.20 8S ee ie Se SOE a ee eee 500 1 2a) 
PF oS nn ple ica ey ees gee I Le ee ee eee ee Ee 138 0. 25 1 
1 Most of these volumetric units are not capable of absolute conversion because of the character of the 
product and the manner ofits utilization. 
2 The board foot per cubic foot ratio varies greatly, depending upon usage. Theoretically, 1 cubic foot 
contains 12 board feet. For average values 6 should be used, though 10 is a convenient figure for approxi- 
mations. When the conversion applies to tress, ratios of 3 to 8 should be applied. 
3 The number of cubic feet of wood per thousand board feet varies as between softwoods and hardwoods. 
Tn softwoods, conversion factors vary from 160 to 220 cubic feet (working average about 183), and in hard- 
woods, from 220 to 250 (working average 242). 
4 Standard cord is 4 by 4 by 8 feet and contains 128 cubic feet gross volume (3.626m*) . Because of methods 
of piling, character of material, ete., a cord of wood contains from 75 to 115 cubic feet. 90 cubic feet is taken 
as a rough conversion figure generally applicable. 
