upr000045 27

19. test wells under high pressure without the trouble of raising the casing as high above the surface as the artesian water would flow. The rotor in the meter turns as the meter is lowered into the well, and by carefully observing the velocity of the rotor in comparison with the rate the meter is lowered, am increase in the velocity of the water can be noted easily. In addition to this precaution the meter was held steady for observations of velocity at points in the well, the distance apart depending upon the results obtained. In all cases the meter was lowered into the wall as far as it would go. Results of the tests for underground leakage The results of the tests made in 1938 with the deep-well meter in wells in the vicinity of Las Vegas, Nevada, are as follows. The locations of the wells are shown in figure 1 _/ and the well information / Figure 1.—Map of a part of the Las Vegas area showing location of wells that were examined. is given in the table of wall records. Well 1 Well 1, owned by H. Taylor, is on ground that is higher than the level to which the artesian water Will rise; hence the well does not flow. When inspected on August 15, the casing was obstructed with rocks about 10 feet below the land surface and the deep-well meter would not pass that depth.