Reports and Proceedings—Geological Society of London. 375 
the Geological Society some specimens of Burmese rubies attached to 
their matrix, which were procured by Mr. Barrington Brown, at 
present employed by Government in examining the mines which 
came into their possession on the annexation of Upper Burmah.”— 
Mr. Barrington Brown writes concerning these specimens thus :— 
‘IT send . . six specimens of rubies in granular limestone, where 
they were formed. They were obtained by blasting, under my 
direction, in a place formerly mined by natives... . As I believe 
the fact of the ruby being traced to its matrix is new to science, the 
specimens may prove of interest to scientificmen. . . . I should like 
Professor Judd, President of the Geological Society, to see the speci- 
mens.’—I am, Sir, your obedient servant (signed) J. A. Godley.— 
Bern Geological Society.” 
“On the Sudbury Copper Deposits (Canada).” Byido) He 
sateen Hsq., F.G.S: 
These deposits occur in Huronian rocks. The author described two 
exposures, known as Copper Cliff and Stobie, about 8 miles apart. 
At the former the ore was found in the face of a cliff of diorite 
about 40 ft. high. 
The ore exists in three distinct forms :— 
1. As local impregnations of siliceous and felspathic beds of clastic 
origin, in the form of patches and strings of cupreous pyrrhotite. 
2. As contact-deposits of the same material lying between the im- 
pregnated beds and large masses of diorite. 
3. As segregated veins of chalcopyrite and of nickeliferous 
pyrrhotite, filling fissures and shrinkage-cracks in the ore masses 
of the second class. 
The author considered the first as original, or of high antiquity ; 
whilst the two latter are due to segregation produced either by intru- 
sion of diorite, or by internal movements. He compared these deposits 
with those of Rio Tinto of Devonian age, showing their similarities 
and differences. At the latter place the intrusive masses are quartz- 
porphyries, and the metallic deposits consist mainly of bisulphide 
of iron. The ore-bodies in the Canadian deposits are not so large. 
From the cupreous pyrrhotite of Sudbury, rich though it be, com- 
pared with the Rio Tinto ore, the copper cannot be so cheaply ex- 
tracted by the wet method, and the ore is of no avail as a source of 
sulphur. Nickel is everywhere present in the cupreous pyrrhotite 
of Sudbury, and of no advantage to the smelter. The differences 
above recorded are probably not due to differences in the containing 
rocks, since similar differences may be noticed in the pyritous deposits 
of Canada, where the country rocks are identical. 
3. “Notes on some of the Auriferous Tracts of Mysore Province, 
Southern India.” By George Attwood, Hsq., F.G.S., F.C.S., ete. 
_ The author was employed during parts of 1886-7 in inspecting 
a large area of mineral lands in Southern India supposed to be 
auriferous, and the paper contained the results of his observations. 
1. Melkote Section. —This section (in the Hassan district of the 
province of Mysore), starting one mile west of Melkote in a north- 
easterly direction, exposed gneiss, mica-schist, hornblende-schist, 
