Oe ee ee ee TS ee ee mee anys 
Ce wee Meee et ee ee ee 
WATER SUPPLY IN THE INTERIOR OF NEW SOUTH WALES. 91 
trace of any organism,” and describes them as “ chiefly silica 
in angular grains, such as would be derived from rocks of a very 
silicious nature, such as the silurian, devonian, or tertiary sand- 
stones, or some kinds of granite.’ 
Th e probably derived from the same strata as the quartzite 
Siiglonearates called murillo ridges, or from these conglomerates, 
The oe analyses are by Mr. Chas. Watt, Government 
Analyst 
Analyses of red soil from the Darling watershed. 
Fixed Substances, 
Soluble in cold hydrochloric acid— 
In 100 parts 
ph ahaa of iron..... 2°76 
Alur 2°51 
Lim 82 
Magsien ID sce yesseesecsevere aoe ea eveves “86 
Potash (KO) cnisrits sewers ‘37 
Soda ( ) 10 
osphorie acid 07 
Sulphuric acid ... trace 
OOTISGBIC BAI 55 Soo ipicck ds 'Sisaenusxens trace 
Soluble pies Oe. 0 
ME Sct even ndibiiiinbensesees our dbe erat trace 
Decomposable by sulphuric acid— 
Peroxide £3700; sends Aree Dares 2:31 
umina 8°73 
Potash (K,0) 06 
Sods, (NGO). cc Adicsesiveescurverevs sey svsevs 
neg and silicates, undecomposable by 
sulphuric acid 69°84 
Combustible and volatile substances— 
Moisture at 125° C 7°50 
ss on ignition ,. 2°24 
Total ammo: 7 
Nitrat trace 
100°17 
Analyses of black soil from the Darling watershed. 
Fixed Substances. 
Soluble in cold hydrochloric acid— 
Peroxide of iron 1°78 
mg ; a7 
i eee eee eee bee B* etter eeeeesreree tee 127 
Magn 68 
Potash ( (20) “45 
a (Na,0) ; . trace 
