eee 3 
from sag on the Newtown 
found i this water were as follows :— ae 
Free, Albuminoid. a 
May re ae “O14 bE OT a 
perme Ray bi) 9 lage eee j : 
44 _ THE WATER OF SYDNEY I[ARBOUR. 
is distilled in a glass retort, and successive portions of the — 
distillate are examined for ammonia by means of the extremely — 
delicate test known as Nessler’s Reagent. This reagent: yields, 
in solutions containing ammonia, a yellowish brown coloration, — 
solution containing a known quantity of ammonia in a given 
volume of liquid, to imitate the colour produced by the water — 
which is being examined, and so to estimate with great accuracy — 
the amount of ammonia which it contains, The liquids for com- — 
tillation is suspended until a solution of potash and permanganate of a 
potash, previously well boiled, has been introduced into the retort. 
in 
organic matter is converted into ammonia, and the quantity of ‘ 
second yield of ammonia is distinguished as “albuminoid.” The — 
process thus slightly sketched is described in detail in Wanklyn : 
5 i r) . > he 
and Chapman’s book on “Water Analysis,” and less fully m 
ra) PS Sy : eRe 
alysis. 
“i 
si results of this process are registered in terms of the litre — 
a8 a unit of volume and the milligram as a unit of weight. It — 
is 
pein But before considering the water of the ocean, it may — 
well to instance the amount of ammonia, free and albummolG 
2 an Some samples of ordinary drinking water 
—It wi 
=} ig Pees. 
be remembered that the month, of 
: | of heavy and continued rainfall. Durmg— 
ut period I made three analyses of Sydney drinking water taken : 
Road. The quantities of ammonis = 
PS on ONE 065 
