Nitrogen Fixation 31 
I do not know how much water was flowing in this stream at 
the time the sample was taken. Nor do I know how much the 
average flow of this stream may amount to. I imagine that the 
flow varies greatly from time to time. 
The next sample is one of a drain water taken in Oct., 1907. 
This drain was one of the main branches of a system put in 6^2 
years prior to the taking of the sample for the purpose of improving 
a piece of ground lying to the east and south and partly to the west 
of a rather large orchard. In spite of the drain the bad soil con¬ 
ditions have encroached upon the orchard area necessitating the re¬ 
moval of trees till the orchard is much smaller than it was six years 
ago. The case of this orchard is rather peculiar. There is on the 
north and west sides of the orchard a wash ranging from 6 to 10 
feet deep and on the east, south and part of the west side is this 
system of drains and yet in June of this year I saw some of the 
few remaining trees in the extreme southern portion of the orchard 
very badly burned by nitre. The drain is a box one, seven by six 
inches laid 4L2 feet deep. The land above the orchard was boggy 
at the time the drain was laid. It has been unwatered to the extent 
that grain can be grown on the greater portion of the land. The 
yield on some parts of this land is excellent. The condition of the 
orchard as suggested is gradually becoming worse and is at this 
time a promising subject for study. Total solids 637.3 grains per 
imperial gallon. 
The analysis has been calculated to one hundred. 
ANALYSIS XXVIII. 
RESIDUE FROM DRAIN WATER. Laboratory No. 610. 
Per Cent. 
Calcic Sulfate . 23.203 
Magnesic Sulfate . 36.662 
Potassic Sulfate . 0.705 
Sodic Sulfate . 29.991 
Sodic Chlorid . 2.863 
Sodic Carbonate . 4.093 
Sodic Nitrate . 2.275 
Silicic Acid . 0.209 
100.000 
The residue gave off water and red fumes when heated in a 
test tube. A sample of this drain water taken in June, 1909, about 
20 months later, showed the presence of 622.65 grains of total 
solids per imperial gallon. Loss on ignition was 99.26 grains per 
imperial gallon. The ammonia was found to be 0.56 part per mil¬ 
lion. The analysis has been calculated to one hundred. 
