OCCURRENCE OF PLATINUM, GOLD AND TIN IN BEACH SANDS. 369 
zircons, quartz, and a small amount of cassiterite, platinum, 
iridosmine and gold. A large number of samples of the crude 
sand and concentrates, have been examined in the Laboratory 
connected with the Department of Mines, the following being a 
few of the results obtained :— 
1. Gold a trace (under 2 dwts. per ton), platinum a trace (a few 
grains per ton). 
2. Gold a trace (under 2 dwts. per ton), platinum a trace (a few 
grains per ton). 
3. Gold 1 oz. 12 dwts. 16 grs. per ton, platinum a trace (a few 
grains per ton). 
4. Gold 1 oz. 12 dwts. 16 grs. per ton, platinum a trace (a few 
grains per ton). 
5. Gold 6 dwts. 12 grs. per ton ; silver 1 oz. 12 dwts. 16 grs. per 
ton ; tin a trace; platinum a trace (a few grains per ton). 
6. Gold 5 dwts. 10 ers.; silver 103'dwts. per ton; tin a trace ;. 
platinum a trace (a few grains per ton). 
7. Gold 15 ers. ; silver 4 dwts. per ton ; platinum a trace (a few 
grains per ton). 
8. Gold and silver, traces; platinum a trace(a few grains per ton).. 
9. Gold and silver, traces; tin 2°5%; platinum a trace (a few 
grains per ton). 
10. Gold 154 dwts., silver 54 dwts. per ton ; tin, 7-207 ; platinum: 
(under | dwt. per ton). 
Concentrates— 
. Platinum 501 oz. 2 dwts. per ton ; tin, 51:03 per cent. 
. Platinum 19 oz. 18 dwts. 12 grains per ton. 
. Platinum 1160 oz. 10 dwts. 20 grains per ton. 
. Platinum 4°3 per cent., metallic tin 13°58 per cent. 
Oo - Ct DO 
. Platinum 395 oz. 11 dwts. 20 grains per ton. 
Note.—Tin was present in all these samples, but the percentage: 
was not determined in every case. The gold had been separated 
by amalgamation. 
Mr. E. Jones, 3.p., Warden for the Richmond River district,, 
in his Annual Report to the Under Secretary for Mines and 
X—Dee. 7, 1892. 
