5 
The foregoing figures give the following tabulated 
results : — 
Grains per Gallon. 
Lr. Sample. Up. Sample. Dr. Roscoe’s. 
Total solid matter 315 ... 2 20 ... T45 
Mineral matter 1 '40 ... 1 '50 ... — 
Loss on ignition 1*75 ... 0*70 ... — 
Total hardness 1*00 ... 1*00 ... 0'50 
Permanent hardness 1*00 ... 1*00 ... 0'50 
Chlorine 0*70 ... 0'42 ... 0’42 
Nitrogen as nitrates and nitrites.. — ... — ... 0'0247 
Free ammonia 0'0021 0'00 
Albumenoid ammonia 0'0042 04)049 
The “ ammonias” expressed in parts per million are 0'03 and 
0'06 respectively; the chlorine equals 0*7 and 1*16 grains per 
gallon of salt. 
The water was very clear and sparkling, practically free 
from sediment, and its reaction perfectly neutral to litmus. 
There was no reaction for heavy metals, copper, lead, iron, 
&c., although we observed that there ran in close to the top 
of the lake a small stream of a very turbid milky appearance, 
upon which is situated on the side of the hill towards Hel- 
vellyn, a lead mine; which stream could be traced by its 
colour for at least 20 yards into the clear water of the mere. 
These mining operations we understand will of course be 
completely done away with on proceeding with the water 
scheme. 
We may offer the following brief remarks upon the above 
analysis of the water of Thirlmere. In the first place it is 
evident that the water is one of the very purest description 
found in nature, not being surpassed by that of any locality 
in Great Britain of which analyses have been published. 
As regards its use for manufacturing purposes it practi- 
cally could not be improved. For drinking purposes 
also it is perfectly free from anything which could be con- 
sidered objectionable, of either an organic or mineral 
nature, though we are not prepared to assert that a water 
considered “solely” as to its suitability for this purpose 
