762 
PROCEEDINGS OF SECTION II, 
tidal influence below Yaarnba, and beyond the tidal influence above that 
place. The following are analyses of samples of water from the river 
during a dry season and outside of the tidal influence : — 
At Yaamba. 
From Alligator Creek. 
Organic matter 
trace 
trace 
Total fixed salts 
28*70 
29-60 
Hardness 
15-00 
1600 
Chlorine 
4-20 
4-90 
Nitric acid 
none 
none 
Sulphuric acid 
none 
. . . none 
Ammonia 
trace 
... trace 
Albuminoid ammonia 
trace 
trace 
order to test the feasibility of taking 
a water supply from 
the river Fitzroy within the tidal influence near Eockhampton, I have 
taken observations of the saline matters in the water, the observations 
being extended over a period of over twelve months. The results are 
shown in the following statement : — 
Statement of Observations of the Water in the Eiver 
Fitzroy, Eockhampton. 
1892. 
Oz. of Salts per Gallon. 
July 7 to 29 
... From -J to |- 
July 29 to August 1 ... 
... Water fresh 
August 2 to 30 
... From J- to -J 
September 1 to 30 
... From to li 
October 1 to 26 
... From 1 to 2 
October 27 to 31 
... From 2 to i 
November 1 to 30 
... From f to 
December 1 to 31 
— to -A - 
... 4 IO U 
1893. 
January 2 to 20 
... From T V to 0 
January 20 to February 28 ... 
... Water fresh 
March 1 to 9 
... 0 to yq (nearly fresh) 
March 10 to 29 
... AVater fresh 
March 30 to April 20 
... From -J- to £ 
April 21 to May 18 
... From i to 
May 19 to 30 
... W ater fresh 
June 1 to July 31 
... From -±r to 
August 1 to 7 
... From i to T \- 
August 7 to 11 
... W ater fresh 
August 11 to 16 
... From i to 
It will be seen that the water of the river within the influence of 
the tide contains salts in large quantities, as might be expected; in 
fact, the quantity of salt is so large as to make it impracticable to take 
a supply from it for domestic use. It had been alleged by observers 
that the fresh water flowing down the river passed over the surface of 
the salt water coming up with the flow of the tide without much inter- 
mixture, and in order to test this theory I had the samples taken daily 
from near the surface of the river for examination by the salinometcr. 
In addition to the saline matters in the water, the fact that a consider- 
able quantity of town sewage is poured into the river constantly, and 
by the flow of the tide could be carried within reach of any pumping 
