The importance of regularly analyzing the rain and snow for nitrogen and other compounds is widely recognized, both for its agricultural and hygienic significance. Messrs. F. T. Shutt and R. L. Dorrance of Ottawa, Canada, carried on a systematic investigation of the rain and snow through a period of ten years, 1908 to 1917, the results of which study have added much to our knowledge of the importance of the nitrogen compounds as an agricultural factor.
Proceedings of the Iowa Academy of Science
©1920 Iowa Academy of Science, Inc.
Trieschmann, Jacob E. and Knight, Nicholas
"Nitrogen and Other Compounds in Rain and Snow,"
Proceedings of the Iowa Academy of Science, 27(1), 159-164.
Available at: https://scholarworks.uni.edu/pias/vol27/iss1/19