58 ROYAL SOCIETY OF CANADA 
The total amount of nitrogen furnished per acre is practically 
mid-way between the amounts for the two previous years, as will be 
seen from the following tabulated statement. 



Total Pounds 
Rain Snow precipi- of 
in in tation in | Nitrogen 
[uches Inches Inches per Acre 
Year ending February 28, 1908.... 24.05 133.0 37.35 4.323 
Ki x 4 OOO Rs 22.99 96.25 32.63 8.634 
de Le i 1910 28.79 80.75 36.87 6.869 
Average for 19 years ......... 25.52 92.56 34.78 

The disturbing factors characterizing the summer of 1908—ex- 
tensive bush fires and high winds during periods of drought—were 
absent, and consequently the data of the past year represent more 
nearly the amounts of the nitrogen compounds normally furnished by 
the rain and snow in this district. 
Considering the total amount of nitrogen per acre, we find that 
4.46 lbs., or 65 per cent., was furnished as free and organic ammonia; 
2.41 Ibs., or 35 per cent., as nitrates and nitrites. | 
AVERAGE NITROGEN CONTENT Ok RAIN AND SNOW—AMOUNT OF NITROGEN, PER 
ACRE, AS FREE AND ALBUMINOID AMMONIA AND AS NITRATES AND NITRITES. 



Nitrogen 
a Parts per Million Percent. of Total Per Acre 
D omens 
Bie Ya ee ee 
6 215 2| In In |In Ni- In In InNi-|As Free! As Ni- 
À Es * & | Free | Albu- | trates Free | Albu-| trates)& Albu-| trates 
5 & 2 e Am- \minoid} and |Total| Am- |minoid| and |minoid | and 
& (A, |monis| Am- | Ni- moma | Am- | Ni- | Am- | Ni- 
A monia | trites monia | trites | monia | trites 







| 
| 
| 
| Lbs. | Lbs. 
Rain | 75 28.79) .429 | .148 | .319 | .894) 48 | 17 | 35 | 3.79 | 2.04 

Snow| 36 80.75) .269 | .097 .203 | .569) 47 17 36 .67 .37 
| 







The rain, it will be observed, supplied 5.83 lbs. of nitrogen, ap- 
proximately 85 per cent of the whole; the snow, 1.04 Ibs., or about 
15 per cent. 
