ae 
1883. } 109 
Working on a larger scale, the following result was arrived at, in the 
chlorination works near Salisbury, N. C. : 
1963 tons worked ; average ASSAY. ..eeeeeeeeerrees $6.11 = $11,904.19 
Net returns fron U.S. Mint...cccsceoesseerssereee80ld == 11,158.82 
$835.37 
Which shows a loss in working equal 48 cents per ton. 
By careful and constant assays of the spent sands, this loss is accounted 
for, by the washing in the leaching tanks being arrested before the last 
traces of gold were removed. To thoroughly wash these sands would re- 
quire a large volume of water, and the loss is regarded as an economic 
waste, 
On this point Dr. Jno. F. Boynton, in a report on an experimental test 
of the process, reports : 
“ The spent ores, or tailings, as found in the leaching vats after washing, 
were subjected to rigid examination ; samples were taken of each charge, 
and careful fire assays made, and in no case did an ounce assay afford gold 
equal to the one-thousandth part of a grain.”’ 
Without entering into the technical details or the costs of manipulation, 
the above results are presented as evidence that the refractory ores of gold 
may be worked on an enlarged scale by the joint chlorine and carbon 
processes, and may in the end utilize the vast stores of these ores, which 
lie useless in our Southern and Western gold fields. 
Stated Meeting, May 4, 1883. 
Present, 18 members. 
President, Mr. FRALEY, in the Chair. 
Letters accepting membership were received from Prof. 
Heilprin, dated Academy Natural Sciences, Philadelphia, 
April 4; Mr, A. E. Lehman, dated 907 Walnut street, Phila- 
delphia, April 80, 1883; Mr. Philip C. Garrett, dated Fair- 
field, Germantown, Philadelphia, May 8, 1883, and Mr, Dill- 
wyn Parrish, dated Philadelphia, May 5, 1888. 
Letters of acknowledgment were received from the Verein 
fiir Erdkunde, at Dresden (108); and the Accademia dei Lincet 
at Rome (109, 110, 111). 
