BY HENRY TRYON. 10g 
respectively by Gleosporium cucurbitaceum and Meliola musee— 
both first observed here by Mr. F. M. Bailey, or the “rot” in the 
same plant whose occurrence is attended by the presence of a 
fermentaticn fungus—a torula—in the cell tissue. But all these 
affections are accounted for, perhaps, by the unhealthy conditions 
under which the plants, subjected to their presence, are grown. 
ON THE MINERAL 
SCOLECI TE, OCCURRING ONCEGRANITE, 
CHARTERS LOWERS; 
BY 
A. W. CLARKE, Esqa., Government Mineralogical Lecturer. 
(Read on 5th August, 1887.) 
THE occurrence of calcite with gold-bearing quartz in granite 
country on Charters Towers goldfield is of some interest to 
geologists. Mr. R. C. Ringrose first suggested to me that the 
gradual decomposition of lime felspars might account for its 
presence; as yet, however, I have, not succeeded in finding 
anorthite, labradorite or andesine in the few specimens of country 
rock brought in by students, but last week I observed the enclosed 
mineral, now submitted for inspection, on the cleavage planes of 
granite rock through which a shaft is being sunk. The specimen 
comes from about 600 feet below the surface of the Queen Block 
Extended. An analysis of 15.43 grs. (1 gram.) yielded :— 
Silicama: ‘ : : ; 46.25 
Alumina F ; : : Diy 
Iron C ; : : : traces 
eines. : ; : ¢ 13.95 
Water (by ignition) é : 13.47 
IO1.02 
The mineral is probably Scolecite (véde Collins’ Mineralogy, 
vol. IL., p. 220).* A few blebs of calcite occur in a kind of forma- 
tion through which the shaft is now passing. ‘The carbonate of lime 
is in the form of calcite, not arragonite, pointing to crystallization 
in the cold. 
* The crystals float in Sonstadt’s Sol. (S. gr. 2.6), therefore their S. gr. is 
lower than 2.6. I have no appliances for accurate determination. 
