PAO FANNING AND EDDINGFIELD. 
TABLE XXI.—Screen, amalgamation test. Lot No. 1. 
pune a Gold 
produc , 
Screen. Weight. | Weight. gene fas vee vr oott eavedin | 
mation, | ‘5- saved. | product. 
per ton. 
Mesh. Grams. | Per cent.| Pesos. Pesos. |Mgrams.| Per cent. 
Ue ere 487.0 9.63 324. 70 83.30 98.00 74.2 
20 reat ee we 657.5 12.95 375. 00 61. 60 161.90 83.5 
Cee ea 643. 0 12.67 141.20 46.20 50. 80 65.3 
(eee 546.5 10. 72 93. 70 22.20 32.50 76.3 
SOQ KCee ee eee 734.5 14. 42 70. 50 36. 40 20.10 48.4 
100 4.282 2202 32252 569. 0 11.19 36.20 8.40 12. 85 76.8 
150: 4. Sst eee 880.5 17.31 20.50 13. 50 5. 20 34.1 
(i150 eee 560. 9 11.11 40. 60 7.50 15. 50 81.5 | 
Totalias see se 5, 078. 9 00300) |B=2eeeeees | beeen sans 396. 85 |--------_- | 
Each mesh was separately amalgamated, and the pieces of 
gold picked out of the 10- and 20-mesh were credited to amal- 
gamation. On the 10-mesh, 90.5 milligrams of gold were picked, 
while 7.5 milligrams were recovered by amalgamation; on the 
20-mesh, 157 milligrams were picked, while 4.90 milligrams were 
recovered by amalgamation. On the other meshes no gold was 
picked and the gold was saved entirely by amalgamation. 
This table shows that the 10-mesh product assayed 324.70 
pesos per ton before amalgamation, and assayed 83.30 pesos per 
ton after amalgamation. This indicates that 74.2 per cent of 
the gold on this mesh can be saved by amalgamation. The figures 
for the other meshes are given and the following points can be 
seen: (1) The weights on* each screen are fairly equal; (2) 
the assay values decrease from the 10-mesh downward and 
this decrease applies (although less regularly) to the tailings 
as well; (8) considering each screen alone, the percentage of 
recoverable gold shows no system of increase or decrease in 
comparison with the individual recoveries on other screens; thus, 
on the 10-mesh the recovery is 74.2 per cent, on the 80-mesh it 
is 76.8 per cent, etc. However, when the amount of gold amalga- 
mated per ton of original is shown for each screen, it is evident 
that the greatest amount of gold is recovered in the coarse 
meshes and decreases progressively with the finer screens. This 
is shown in Table XXII. 
