422 
The Extraction of Gold. 
[July, 
pyrites, mentioned above as found to be ineapable of treat- 
ment in Queensland, yielded 2 02s. 12 dwts. ’ . 
?o ner cent of its total contents. This increased yield of 
the P precious metal is obtained, further, not at an increase 
greatly 
which U must not le overlooked. In the first pUce |watcr ^s 
dispensed with. This, in a country like Britain, may see 
a trifling point; but in many gold-fields— in Austiaiia, 
California, and South Africa-water is often . very scarce 
and the introduction of a process in which it is not requi 
will be no small boon to the mining communities. 
Another consideration is that the process is selt-aa.ng 
The amalgamation apparatus may be locked up in a strong 
room and will go on with its duty undisturbed. Thus there 
L ndther opportunity for pilfering, nor are the men exposed 
to the fumes of mercury. npr „ nn „ more 
Though this invention emanates from persons moie 
direaly connefled with the gold industry Q ueensla A 
we must not for a moment suppose that the process is 
annlicable there only. In other parts of Australia, in 
California, Mexico, &c., the very same condmons prevail, 
nnf i sa me waste is going on, for which we have here 
the remedy. It must especially be noted that though many 
samples of quartz from the Wynaad, and. other distndts of 
India are found when assayed to contain fail, and eve 
large > percentages of gold, yet the mines m question are 
not" remunerative. We are surely warra , n e t f tQ 1 ^ a \tS 
that this new process is the condition needed to make these 
mi U the annual output of gold 
for the whole world is £20,000,000. Now if we leave out 
of view the inferior stone, the waste ores, and the ac- 
cumulated heaps of tailings, we may form some idea 
nf the value of a process which, if generally put in 
practice, must increase this yield by at the least 25 to 30 
Pe The n process has been patented in all countries where 
gold -mming is likely to be carried on. The patents for the 
TTt-ii+ P rl Kingdom (No. 323^, November 5th, A.L>. 1003, ana 
« same date) are taken out in the respea.ve 
names 3 of Thomas Rowland Jordan, and ol Thomas 
Rowland Jordan and John Needham Longden. To the 
specifications we must refer our readers for fuithei par- 
ticulars. 
