122 Canadian Record of Science. 
Military College, by Capt. Cochrane (R.M.C.), and by my- 
self. There has been substantial agreement in all these 
analyses, as follows : 
Free ammonia...... ee. Fite cee vec Little or none 
Albuminoid ammonia......--.+ee. -09 
Chlorineetmcecrawercd be cee 
The Dominion analyst analysed a sample drawn from a 
tap in the city, and reported : 
IDRED Ghia Nhe Sonomodos paobG60000 oobHO Sakata -050 
IN oynharub coy 16 Reo Be SE OOOLe RAEI OO AOE CODE A Go4c -100 
GSHLOTING heise ie we iaieaie wolele area aree hee teceret eel oars 7) 5) 
These results indicate a water of fair purity only, and 
considering the increased flow of sewage owing to growth 
of the city and extension of the drainage system, it was 
decided to extend the suction pipe to a point B (see map) 
1300 feet out from the present intake. The Board of Health 
considered it advisable to have the two sources tested to see 
what improvement in purity would be made by the change. 
Samples were taken April 15th, 1891, from A at 18 feet 
from the surface and B at 30 feet from the surface. In 
this, as on all other occasions during this investigation, the 
samples were brought to me in numbered bottles, and I was 
ignorant of the sources from which they were drawn. This 
freedom from prepossession is perhaps desirable where the 
results of the analysis depend so much on delicate distinc- 
tions of shades, as in Nesslerising. The results showed the 
present source to be a little better than the proposed : 
Free Alb. Oxygen 
Sample. Ammonia. Ammonia. Chlorine. consumed. Solids. 
No.1 (new intake) .013 10 5.2 1.38 126 
No. 2 (old intake) .000 -09 5.0 0.82 128 
This unexpected result led to a repetition of the analysis. 
Samples were taken on April 20th : 
Free Alb. Oxygen 
Sample. Ammonia. Ammonia. Chlorine. consumed. Solids, 
No, 8 (new) .----. .007 10 4.5 1.26 106 
‘No. 9 (old) ....-.. .007 -09 5.2 1.44 103 
_ This left no doubt that the proposed intake was at any . 
rate no better than the present. 
