224 Value of Native Gold, éc. 
1 lb. 8 oz. 1 dwt., equal to 88°6 grains to the ounce. 
On reference to the second Table, it will be seen that the 
specific gravity of a mixed specimen containing 88°6 grains 
of quartz to the ounce will be 12369, and its value 
73s. 66d. per ounce. The value given in the return as 
that of all the specimens is £913 10s. 1d.; but Standard 
Gold is taken at 77s. 9d., while in the Table it is valued at 
77s. 103d. Making allowance for the difference, the return 
from this Gold would be £914 9s. 4d., or at the rate of 
73s. 4°46d., a result very slightly different from that given 
in the Table. 
The conclusion which I should be disposed to draw from the 
experiments which I have here submitted is, that the value 
of specimens of Gold, carefully washed and freed by the 
use of the magnet from magnetic iron ore, can be estimated 
with every necessary degree of accuracy by means of delicate 
scales; the specific gravity being an accurate test not only 
of the amount of extraneous matter mixed with such Gold, 
but also of the character and value of the metal itself. 
The subject, however, is far from being exhausted. 
Accurate experiments in the specific gravity of Californian 
Gold are much wanted: analysis of Australian Gold, show- 
ing all the elements which enter into its composition, will 
be most valuable: enquiries into the molecular arrangement 
of those specimens which appear to be crystallized will be 
very interesting. 
I trust, therefore, that other Members of the Society will 
turn their attention to these points, and to such others as 
may appear to them to be of importance, and communicate 
the results to the Society; while I for my part will continue 
the series I have already commenced, extending it so as to 
include Sydney and Californian Gold, or that from any other 
country from which I am able to procure specimens. 
