BY THE SAME AUTHOR. 
Contribution to the Microscopic Structure of some Austra= 
lian Rocks. With three plates. 8vo. , sewn, 3s. ; 
post free, 3s. 2d. (Royal Society Prize Essay, 1892.) 
Reprint from Roy. Soc. N. S. Wales. 
Contribution to the Geology and Petrography of Bathurst, 
New South Wales. With four plates. 8vo., sewn, 
3s. ; post free, 3s. 2d. Reprint from Linnean Society. 
Gems and Precious Stones of New South Wales. With 
eight plates. 8vo., sewn, 3s. ; post free, 3s. 2d. 
(Royal Society Prize Essay, 1896.) 
Notes and Tables for Chemical Students. 202 pages. 
Demy 8vo., cloth gilt, 4s. 6d. ; postage, 7d. 
Silver Ores, and How to Test Them. loolscap 8vo., 
120 pages. [ Out of print. 
Useful Minerals : How to tell them. With 30 illustrations. 
3s. 6d. ; post free, 3s. 8d. [In \ preparation . 
Elementary Geology for Australian Students, with about 
200 illustrations, mostly of Australian subjects. 
[In preparation. 
ANGUS & ROBERTSON, 
Publishers, Sydney. 
