ABSTRACT OF PROCEEDINGS, XV a 
Remarks were made by the President and Dr. QUAIFE. 
2. “‘On the elastic substance occurring on the shoots and 
young leaves of Eucalyptus corymbosa and some 
species of Angophora,’’ by HENRY G. SMITH, F.C.S., 
Assistant Curator, Technological Museum, Sydney. 
Remarks were made by Mr. F. B. GuTHRIE£, Mr. J. H. 
MAIDEN, and the President. 
EXHIBITS. 
1. A large number of portraits of Australian botanists, 
by Mr. MAIDEN. 
2. Specimens illustrating paper by Mr. HENrRy G. SMITH. 
3. Dr. W. G. WOOLNOUGH exhibited specimens of bacterial 
silt from water main at University. These bacteria exist 
in absence of light and oxygen and under pressures greater 
than atmospheric. Bacteria exist under similar conditions 
in deep lake and sea waters and cause precipitation of 
ferrous sulphide FeS. This causes the colouration of muds 
so deposited, and may eventually give rise to formation of 
marcasite or pyrite FeS,. Compare the “’ Brassy Tops”’ 
of the Greta Coal Seam. 
4, Samples of blue earth, being the matrix of diamonds, 
from the Premier Diamond Mine, Cullinan, Transvaal, were 
exhibited by Mr. JOSEPH PALMER. 
ABSTRACT OF PROCEEDINGS, AUGUST 5, 1908. 
The General Monthly Meeting of the Society was held 
at the Society’s House, No. 5 Elizabeth-street North, on 
Wednesday evening, August 5th, 1908. 
W. M. HAMLET, F.I.C., F.C.S., President, in the Chair. 
Twenty-five members and one visitor were present. 
The minutes of the preceding meeting were read and 
confirmed. 
