Tests of Mount Rose Snow scale No. 101

Three sets of tests were made on the Mt. Rose snow scale No. 101. An initial load of 3 lb. (47.1) inches of water was applied. The index set to zero, and successive 1 lb. loads were added without unloading the springs. All readings showed less than 1% error in test No. 1. To begin test No. 2, a 2.31 lb. (36.3) in water load was added initially and successive weights added. The largest error was 1.32%. The load was removed after each scale reading in test No. 3, and the index adjusted to zero before the next load was applied. The largest was less than 1%. Loads up to 27 lbs. (400 in. water content) were applied in the 3 tests. Some evidence of fatigue was shown in the high loads. Data from the 3 tests are shown in tabulation and graph is plotted for visual inspection.In discussion by the John Chatillion & Sons Co., of New York, three models of snow survey scales are pictured and a discussion in text form is shown with a calibration chart.