land 
v4 JOHN C. H. MINGAYE. 
the samples submitted for analyses were suspected waters ; and 
in few cases do the waters from the fresh water bores and wells 
find their way to the Laboratory. It is a well known fact that a 
number of these bores yield water suitable for stock and irrigation 
purposes, while in some cases the waters are so impregnated with 
saline matter as to render them dangerous to stock, and useless 
for irrigation. 
This paper comprises some fifty-three analyses, the samples 
being obtained from quarries, rivers, creeks, wells, artesian and 
mineral springs. The analyses which are returned in grains per. 
imperial gallon, have also been calculated into parts per 1,000 in 
order to compare the results with other analyses published in 
England, Germany, and America. 
Potable Waters. 
Nos. | and 2 are very pure spring waters, obtained from the 
Yarrangobilly and Fish River Caves. The analyses were made 
with a view of ascertaining their suitability for drinking purposes. 
Nos. 3, 4, 5 and 6 are from Nymagee and Byerock. The first 
three samples were condemned as unfit for human consumption 
from the excessive amount of albuminoid ammonia present, and 
various other tests made. No. 6 taken from a Government tank 
at Byerock, though not a first rate water, just passes. 
No. 7, Well water from Lewis Ponds near Orange was found 
to be so largely contaminated with organic impurities, as to render 
the water a dangerous one for human consumption. 
No. 8, Sample of water taken from the Parramatta Water 
Supply. An analysis of this water was made on the 22nd June 
1885, which classes it as a second class potable water. 
No. 9. From the same supply, the sample being taken after the 
water had passed through the filter beds in January 1889, there 
being very heavy rains experienced during that month. The 
filter beds were choked up with fine clay, the filtered water being 
of a reddish colour and turbid—due to finely suspended clay. 
