Tests of Mount Rose Snow scale No. 101

TitleTests of Mount Rose Snow scale No. 101
Publication TypeConference Proceedings
Year of Conference1940
AuthorsStevens, J. C.
Conference Name8th Annual Western Interstate Snow Survey Conference
Series TitleProceedings of the 8th Annual Western Interstate Snow Survey Conference
Date PublishedJune 1940
PublisherAmerican Geophysical Union, Transactions, Part III-B:
Conference LocationSeattle, Washington
KeywordsSnow scales test accuracy, Snow survey equipment

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.