252 FANNING AND EDDINGFIELD. 
table. The chief point for emphasis in this process is the conti- 
nuous cleaning of the coco-matting tables. 
Shipping direct appears to be the best present method of sav- 
ing the values, though there is a possibility that magnetic treat- 
ment will give a greater profit. Amalgamation, with or without 
tube-milling, does not seem to be as economical as shipping. 
Cyanidation is probably out of the question in consideration of 
the small amount of black sands saved at present. Should the 
average black sands show much lower value than our lots, ship- 
ping direct would become unprofitable and magnetic treatment, 
or fine grinding, followed by amalgamation must be employed. 
The problem of the future is to save a much greater amount of 
these sands, then, even if the value is lower, cyanidation can be 
employed and a high extraction obtained. 
NotTEe.—Since the writing of this article, a number of changes have been 
made on the dredge. The screen has been replaced by two central chutes; 
only the pay gravel is run over the tables; the tables have been rearranged; 
and cleanups are being made only weekly. This has resulted in saving 
even less black sand than formerly. 
