In the proceedings of the Iowa Academy of Science for 1911, we described a series of experiments to show the amount of nitrogen in rain and snow, which we carried on during the year 1910. The work described in this paper has to do with a series of experiments in the same line during some months of 1911-12. During this period we collected twenty-seven samples altogether, fourteen of which were snow, and thirteen were rain or rain and snow. There were sixty-nine inches of snow and about five inches of rain.
Proceedings of the Iowa Academy of Science
©1913 Iowa Academy of Science, Inc.
"Nitrogen in Rain and Snow: Second Paper,"
Proceedings of the Iowa Academy of Science, 20(1), 189-191.
Available at: https://scholarworks.uni.edu/pias/vol20/iss1/15