BY LEO A. COTTON. 781 



Mr. J. E. Carne, and Mr. C. Saint-Smith for very kind and 

 valuable assistance throughout; to Mr. W. S. Dun, Professor T. 

 W. E. David, and Dr. W. G. Woolnough, of the Sydney Uni- 

 versity, for practical help and sympathy in my work at the Uni- 

 versity; to Mr. Penberthy of Elsmore; to Mr. Stormer of 

 Stannifer, and to many other miners whose kindness and coopera- 

 tion have enabled me togather much of the material that is now 

 presented in this publication. 



EXPLANATION OF PLATES LIX.-LXIV. 



Plate lix. 



Fig.l. — The Macintyre River, south-east from Elsmore, showing bare 



granite-rock on the northern slope of the hill. 

 Fig. 2. — The Tingha Granite, showing biotite and porphyritic felspars: 



two-thirds nat, size. 



riate Ix. 



Fig.L — Cemented rock on Elsmore Hill, showing hard band with inclusions 

 of reef-quartz overlying soft, uncemented rock of the same com- 

 position. 



Fig. 2. — The "Acid Granite," from near Elsmore : half nat. size. 



Fig. 3.— The "Acid Granite," from King's Gap : half nat. size. 



Plate Ixi. 

 Fig.L — Elsmore Hill, showing reef running from pile of stones to observer. 

 Fig. 2. — Specimen from quartz-quartzose reef at Elsmore, showing vughs 

 lined with quartz-crystals; the black patches are cassiterite : half 

 nat. size. 



Plate Ixii. 



Fig.L— Lode-material from Strand Mine, near Howell. Q, crystallised 

 quartz; F, felspar surrounding quartz; C, chlorite: nat. size. 



Fig. 2.— Cassiterite in quartz-felspar lode-material : half nat. size. 



Fig.3. — Quartz and felspar intimately intergrown, from Hutchinson's 

 Felspar-Lode : half nat. size. 



Plate Ixiii. 



i, — Section, from Elsmore to Kelly's Creek; represented by P-P on geolo- 

 gical map. Formations represented as on geological map. 



ii.— Section, from Oakey Creek to Wandsworth; represented by Q-Q on 

 geological map. Formations represented as on geological map. 



Plate Ixiv. 



Geological Map, illustrating the Palaeozoic Geology of the Elsmore-Tingha 

 Tin-field, New England District, N.S.W. 

 80 



