45 
I was greatly aided by the kindness' Qf Mr. Macleod, the 
Sanitary Inspector for Glasgow, who obtained for me samples 
of waters from various liouses situated in the lower parts of 
the town. 
The results are calculated as follows - 
Table H. 
Ammonia and nitrates found in various samples of ivater. 
Mgms. per Litre=Farts per Million. 
i - 
ii. 1 
iii. 
iv. 
V. 
vi. 
vii. viii. j 
IJ^' 
X. 
xi. 
xii. 
Free Ammonia 1 
•005 
•085 
•023 
•015 
•015 
• Olo ' - 035 * 
•015 
•075 
•200 
•045 
Albumenoid Do. ... 
•092 
•120 
•080 
•082 
•090 
•080 
•085 -085 
•070 
•065 
•370 
•090 
Nitrogen as Ni- 1 
trates& Nitrites, j 
•309 
•463 
•321 
•360 
•20 
•258 ... 
1 
•284 
•306 
•414 
These samples were obtained from the following situations. 
No. 1. From main pipe. No. 2. From cistern in same 
house, little used. No. 3. From cistern in house similar to 
No. 2, hut ivater generally used. No. 4. From pipe leading 
directly out of the bottom of cistern in well-situated dwelling 
house. No. 5. From cistern in smaller divelling house. 
No. 6. From small cistern supplying part of a dwelling 
house only. No. 7. From p)uhlic ivell supplied hy Loch 
Katrine water contained in a wooden cistern closed at the 
top. No. 8. FroWo cistern situated just under the slates in a 
house in a lower locality than any of the preceding. No. 9. 
From cistern over water-closet in a dwelling house. No. 10. 
From cistern similar to above. No. 11. From the cistern 
same as No. 9, but after stirring up the muddy deposit at 
the bottom. No. 12. From cistern near the slates in a 
house where there had been tivo cases of fever and ivhere the 
ivater ivas complained of. 
Omitting for the present No. 11, it is found that No. 2 
sample yields the highest number for free and for albumenoid 
ammonia, also for nitrates. Now this sample was taken 
from the cistern of a house in which the pipes have been 
recently entirely renewed, and in which the pipe leading 
from the water-closet to the main drain is thoroughly venti- 
