GOLD AND SILVER IN SEA-WATER. 335 
deposit in this particular tree, there appears to be no reason why 
other trees of this and other species may not be found to contain 
material identical in formation and composition, and all that 
appears to be required is careful search now that attention has 
been drawn to the matter. 
Ox tae AMOUNT or GOLD anp SILVER 1x SEA-WATER. 
By A. LiversIDGE, M.A., F.R.S., 
Professor of Chemistry, University of Sydney, N. 8. Wales. 
[Read before the Royal Society of N. 8. Wales, October 2, 1895.] 
In the following paper are given the results of some experiments 
made with the object of determining the amount of gold in the 
sea-water off the coast of New South Wales. 
The only reference that I can find in Sydney libraries relating 
to the presonce of gold in sea-water, are those of Sonstadt,' which 
Will be made use of later on in this paper, and a reference by 
Dr. T. Sterry Hunt? to a paper read before the American Associa- 
yea for the Advancement of Science in 1866, by Professor Wurtz, 
m which he expressed an opinion that gold would be found in 
“water, but I cannot trace Professor Wurtz’s paper. 
Then in 1894, Mr. E. C. C. Stanford, President of the Society 
eo Industry, in his address to the membefs,’ stated :— 
® Presence of gold has not been satisfactorily proved ; it was 
“xpected it might accumulate in the copper sheathing of ships, 
and Messrs, Muntz obliged me with specimens of old sheathing, 
“opper and muntz metal. Mr. Inglis, who kindly examined 
1 Chom EPR Pam ees ee 
ical News, 1872, pp. 159, 160. 
pe and Geological Essays, London, 1879. 
eurn. Soc. Chem, Ind., x111., July 31, 1894, p. 697. 
