Qt 
=] 
[SHUTT] NITROGEN COMPOUNDS IN RAIN AND SNOW 
as compared with 133 inches), the total amount of nitrogen so furnished 
was less than in 1907-08. 
Considering the distribution of the nitrogen compounds, it will be 
observed that of the total nitrogen furnished per acre, 82.6 per cent, 
or 6.909 lbs., occurred as free and organic ammonia, and 17.4 per 
cent, or 1.455 Ibs., as nitrates and nitrites. Corresponding percentages 
for the preceding year were 74 and 26. 
YEAR ENDING FEBRUARY 28TH, 1910. 
The data for the third year’s work in this investigation are given 
in the following table, the determinations and calculations, being those 
made in the two previous years and already referred to and explained. 
RAIN AND SNOW AT OTTAWA, FOR THE YEAR ENDING FEBRUARY 28, 1910. 















Precipitation in Inches Nitrogen 
Pounds 
Month and Total In Albu-| In Ni- of 
year as | In Free| minoid | trates Nitro- 
Rain | Snow | Inches | Am- Am- and Total | gen 
of monia | monia |Nitrites per 
Rain Acre 
p-p-m. | p.p.m. | p.p.m. | p.p.m. 
March 1909} 1.38 | 24.00 | 3.78 .301 .107 ne .585 .501 
April F 2960) TES ON SE TL .245 .457 .585 | 1.287 | 1.082 
May f 5.84 5.84 .507 .102 .300 .909 | 1.203 
June oe 2.52 2.52 .494 .127 .366 .987 . 064 
July & 4.69 4.69 .374 .072 .198 .644 .684 
August 4 oll 8.11 490 .103 .209 .802 .b65 
September ‘* aes! 2.81 .397 .101 .301 .799 .508 
October 2 163191 ens iil .973 .091 .065 | 1.129 . 284 
November ‘ 2.93 2.50 3.18 .332 .122 .548 | 1.002 .122 
December “ foie 15.00 1.50 .175 .070 .053 .298 .101 
January 1910) 1.36 9.50 2.31 .307 .108 12 .527 .276 
February “ .08 | 22.25 | 2.30 .339 .108 .284 5 P40 .379 
Pis | EE | — 
Total for 12mo.! 28.79 | 80.75 | 36.86 6.869 

The total precipitation was 36.86 inches, 4.23 inches more than 
for the year ending February 28, 1909, and approximately 2 inches 
above the average for the past nineteen years. Of this pre- 
cipitation, 28.69 inches fell as rain and 8.07 inches as snow. The 
rainfall being somewhat higher, and the snowfall considerably lower 
than usual, the proportion of the total fall as rain during the year was 
above the average. There was no season of drought, and the precip- 
itation was very fairly evenly distributed throughout the year. 
