Section III., 1910. | aya) | Trans. R. 8S. C. 
VI.—The Nitrogen Compounds in Rain and Snow. 
By Frank T. SauTT, M.A., F.I.C. 
Chemist, Dominion Experimental Farms. 
(Read September 27th, 1910.) 
The analysis of the rain and snow, with a view of determining 
their nitrogen compounds, was first undertaken in the laboratories of 
the Dominion Experimental Farms, Ottawa, during the latter part of 
the winter 1906-07, and has been continued uninterruptedly since 
that time. From the results of this investigation, two papers have 
already been presented to this society: The Fertilizing Value of Snow 
(read May, 1907), and the Nitrogen Compounds in Rain and Snow 
(read May, 1908). The present paper is a report of progress, and will 
place on record the data obtained for the two years ending February 
28th, 1910. For convenience of discussion, the results of each year 
will be considered separately. 
YEAR ENDING FEBRUARY 28TH, 1909. 
In the following table are given the monthly precipitations, the 
average amounts of nitrogen present as free ammonia, albuminoid am- 
monia and nitrates and nitrites, and the pounds of nitrogen furnished 
per acre. 
RAIN AND SNOW AT OTTAWA FOR THE YEAR ENDING FEBRUARY 28, 1909. 













Precipitation in Inches Nitrogen 
| Pounds 
Total In |InAlbu-| In Ni- of 
Month and as Free | minoid | trates Nitrogen 
Year Rain | Snow | Inches | Am- | Am- |and Ni-| Total per 
of Rain | monia | monia | trites Acre 
p-p.m. | p.p.m. | p.p.m. | p.p.m. 
March 1908} 2.24 | 13.25 | 3.57 . 262 .029 .183 .474 .383 
April x 1.34 | 4.00 | 1.74 .702 .056 .374 | 1.132 .446 
May a 5.46 5.46 .492 .058 .174 .724 .903 
June dE 1.31 1.31 .288 .052 .194 . 534 .159 
July d PART ATA 2.77 .453 .052 .114 .619 .450 
August « Wy Ze 1.72 .638 .061 .208 .907 .354 
September ‘* 1.00 1.00 | 4.839 .716 .897 | 6.452 | 1.462 
October 2.28 Me 2.28 | 3.531 el .551 | 4.253 | 2.197 
November ‘“ 1.48 | 10.00 | 2.48 | 1.337 .129 A7LINI:687 .920 
December “ .21 | 41.75 | 4.39 . 267 .063 .148 .478 .476 
January 1909 2.46 | 11.00 3.56 .266 .124 .129 .519 .420 
February  “ .72 | 16.25 | 2.35 .212 .043 .109 .364 .194 
Total for12mo.| 22.99 | 96.25 | 32.63] ... 54 A 4 8.364 




