ABSTRACT OF PROCEEDINGS. XXill. 
deposit, this was separated and determined by its barium 
salt; no other -.volatile acid could be detected. It is 
evident that the succinic acid is derived from the butyric 
acid by natural oxidation, and it then probably forms the 
basic salt with the aluminium in solution. Investigation 
was made of the ash of Grevillea robusta, of G. Hilliana, 
and of G. striata, but no alumina could be detected in 
either, so that the statement previously made (this Journal 
1895), that aluminium succinate occurred in the timber of 
Grevillea robusta was evidently made in error, and it is 
probable that the tree from which that deposit was 
obtained was Orites excelsa. When portions of the wood 
of the Queensland sample were ignited, it was possible to 
obtain the characteristic cobalt-blue colour for alumina 
when the ash was moistened with cobalt nitrate and 
ignited, the other salts being too small in amount to 
interfere with the reaction. 
Remarks were made by Mr. R. T. Baker, Mr. Steele, 
Dr. R. Greig Smith, Prof. David, and the President. Mr. 
Smith, replied. 
The paper on “‘ The Hconomic effect of Sanitary Works,”’ 
by J. HAYDON CARDEW, Assoc. Mf. Inst. c.5., had, owing to the 
lateness of the hour, to be postponed to the next General 
Monthly Meeting. 
EXHIBITS. 
Mr. ©. A. Stssmilch exhibited gold and antimony ores 
from Hillgrove, including specimens of native antimony, 
cervantite, stibnite, kermesite, and bournonite. 
The following is an abstract of the second Science Lecture 
of the present Session, delivered on the 25th June, by R. T. 
BAKER, F.L.S., Curator of the Technological Museum, on 
‘“The Australian Flora.’? The very high antiquity of this 
remarkable Flora was illustrated by slides and living 
specimens of the “ Burrawang,’’ Macrozamia spiralis, 
