xl. ABSTRACT OF PROCEEDINGS. 
addition to dolerites and basalts a very interesting group 
of basic to ultrabasic: rocks, classed by the authors as 
essexites and pikrites., The last contain rather less than 
39% of SiO.. The iron ore deposits of Mittagong, of late 
Cainozoic age, are considered to have had their origin in 
chalybeate springs, which have derived their bicarbonate of 
iron, by a process of leaching, from the underlying alkali 
felspar eruptive rocks. Chemical analyses have been made 
by the authors of six of the eruptive rocks, as well as of 
the blue amphibole, and full petrological descriptions are 
given of all the type rocks of eruptive origin found in the 
district. 
Remarks were made by Mr. Stanley Jevons, B.A. Cantab., 
B.Sc. Lond., and the authors. 
2. ‘‘ Notes on some Native Dialects of Victoria,’’ by R. H. 
MATHEWS, L.S. 
Mr. R. H. Mathews, L.s., of Parramatta, read a paper 
entitled ‘‘ Notes on some Native Dialects of Victoria,” 
embracing the central and western districts. If this paper 
be read in connection with the author’s former articles on 
“The Aboriginal Languages of Victoria,’ “‘ The Yotayota 
Language,”’ and *‘ The Bureba Language,”’ it will be found 
that the grammatical structure of the speech of the Vic- 
torian Aborigines has been recorded with tolerable fulness. 
EXHIBITS. | 
1. Specimens of chrysocolla, a hydrous silicate of copper, 
showing crystals, pseudomorphous after azurite, from 
Chillagoe, Queensland, exhibited by Mr. C. A. Stissmilch. | 
2. ‘‘ Obsidian Bombs ”’ forwarded by Mr. P. Le Mesurier 
of Hucla, Western Australia, were exhibited by Mr. Henry 
Deane, M.A., M. Inst. C.B. 
Remarks were made by Professor David. 
