. The California fruits and how to grow them;. Fruit-culture. MEASURING WATER 191 figure, so as to dam the flow completely, and the sliding board is moved backward and forward until the water is all passing through the slot, the water being kept up to the top of the board, or 4 inches above the center of the opening. The length of the opening measures the number of miner's inches of water flowing through. If the flow is too great to pass through the opening 1 inch wide, the opening may be made wider, the water still to be kept 4 inches above the center of the opening. The laws of several State
. The California fruits and how to grow them;. Fruit-culture. MEASURING WATER 191 figure, so as to dam the flow completely, and the sliding board is moved backward and forward until the water is all passing through the slot, the water being kept up to the top of the board, or 4 inches above the center of the opening. The length of the opening measures the number of miner's inches of water flowing through. If the flow is too great to pass through the opening 1 inch wide, the opening may be made wider, the water still to be kept 4 inches above the center of the opening. The laws of several States provide that in devices for measuring water for sale by the miner's inch the opening shall be 6 inches high and shall be provided with a slide as shown in the picture. The number of miner's inches then discharged is equal to the number of square inches in the opening. The assumption made that the discharge is proportional to the size of the opening is not true, but the error in measuring small quantities is not great enough to be taken into consideration. By converting the results of measure- ments in miner's inches to gallons, cubic feet, or some other familiar unit, it may be determined how long it will take the stream to fill a reservoir or cover a given field with the necessary depth of water. This unit is readily convertible into cubic feet or gallons or acre- inches of water, according to the time the water pp-P - Measuring miner's inches in a small stream or ditch. The following data will be helpful in computations: One miner's inch, as described above, equals gallons per second, gal- lons per minute, gallons per hour, 12, gallons per day; cubic feet per second, cubic feet per minute, 72 cubic feet per hour. One acre-inch of water (that is, 1 inch in depth over an acre of surface) equals 27,152 gallons, or 3,630 cubic feet, and 1 miner's inch will supply this quantity in about hours. Thus a simple calculation shows that a
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfruitculture, bookyea
