° 
BLACK SANDS OF PARACALE. 927 
it could very effectively be treated by means of cyanidation as 
will be discussed later. 
SHIPMENT OF CONCENTRATES. 
The magnetic separation tests showed that a high-grade ship- 
ping product could easily be separated. This means a saving of 
weight and a corresponding saving in cost of shipping and 
smelting. 
Analysis of the nonmagnetic product showed the following: 
TABLE XVIII.—Analysis of nonmagnetic shipping products. Lot No. 2. 
Constituent. Per cent. 
Insoluble in Hel 35.36 
Sid. 13.26 
Al.0O3 9.43 
Fe.0; 53.93 
CaO 0.96 
TiO: 9.60 
Ss 12.32 
Gold * 170.40 
Silver trace 
2 Pesos. 
The cost of magnetic treatment, including drying, should not 
be over 3 pesos per ton. The total cost of shipping would 
amount to about 16 pesos, and the smelters would make a 
charge of about 12 pesos per ton of dry weight. The Tacoma 
Smelter has stated in a letter: 
In a general way we pay for 95 per cent of the value of the gold and 
silver contents, figuring the gold at $20 per ounce and silver at New York 
quotations date of arrival of the ore at the smelter. No pay for gold 
unless the assay is 0.05 ounce per ton or more and no pay for silver unless 
the assay is one ounce per ton or more. Smelting charges from $6 to $7 
per ton of 2,000 pounds dry weight. Where large shipments are made 
these figures would probably be bettered. 
The total cost can be given approximately as follows: 
TABLE XIX.—Cost of magnetic treatment, shipping, and smelting. 
Factor. Pesos. 
Magnetic treatment (1.7 to give l ton) 5.00 
Sacking and loading on steamers 4.00 
Lighterage, Manila, 3.00 
Wharfage, Manila, 1.00 
Storage 1.00 
Freight to Tacoma 6.00 
Insurance, sampling, etc. 5.00 
Smelting charges 12.00 
Deductions 10.00 
Approximate total per ton 47.00 
