406 J. MILNE CURRAN. 
abraided in the direction of its cleavage. The cleavage surfaces 
of some of this slate are pitted with obscure markings which may 
prove of organic origin. On analysis the slate gives 12:57 of 
graphite. 
IIT.—Anatysis oF WATER FROM WYALONG. 
A remarkable feature in the Wyalong goldfield is the great 
depth to which the prevailing rock, granite, is decomposed. Shafts 
have been put down to a depth of one hundred and fifty to one 
hundred and ninety feet through a granite decomposed in situ. A 
tract of country of this description must absorb a large percentage 
of the rainfall, with little chance of an outlet underground to 
completely drain the saturated decomposed rock. Mr. Farant 
Cox found a very considerable supply of water sufficient for a six 
foot Huntingdon mill without making any impression on the 
available supply. The water was highly mineralised, and as one 
would expect, holds in solution magnesia, lime, soda, and potash. 
A preliminary examination showed that the water held close on 
2,000 grains of total solids per gallon. <A careful analysis in 
duplicate was made by my former assistant Mr. James Petrie 
and myself. 
Analysis of water from shaft at Cox’s Huntingdon Mill, Wyalong- 
‘ ; es 
Silica 268 
Alumina a be 3°052 
Lime... bes ae = in 343048 
PO eh iege: es Oe 
Soda... os iis as ... 651:236 
Potash se oe a nie 6°188 
Sulp. trioxide bed ... 192-430 
Chlorine... ... 924-784 
Water of crystallisation... ... 209°300 
Less O equiv. of Cl. ve sae 208'38 
hear ie 
EE Re eb ES Oe eR ee Rigg ae SENAY FS Gea Wee ae gee <. 
Rl eat ue xs 
