 | Royal Society of South Australia - 1885 - 772 pages
...flux seems to possess advantages equal to those of boracic acid for obtaining a sphere of gold. Borax and other fluxes are so fluid when hot that the gold...3. Weight of a sphere of gold O'Ox mm. in diameter, x' x 0-0000000102102 of a gramme. 4. If 20 grammes of ore are taken for assay the number of grains... | |
 | Royal Society of South Australia - 1887 - 316 pages
...flux seems to possess advantages equal to those of boracic acid for obtaining a sphere of gold. Borax and other fluxes are so fluid when hot that the gold...in diameter, x3 x 0-0000000102102 of a gramme. 4. If 20 grammes of ore are taken for assay the number of grains of gold per ton is found by x3 x 0'008004... | |
 | Edward Hart - 1887 - 504 pages
...very liable to alloy with the platinum wire. The following rules and figures may be useful to any one wishing to adopt the system here described: 1. The...WITH GRAMME WEIGHTS. 1. Weight of a sphere of water o.01 mm. in diameter=o.000,000,000, 523,6 of a gm. 2. Weight of a sphere of gold o.01 mm. in diameter=o.000,000,010,210... | |
 | 1887 - 550 pages
...very liable to alloy with the platinum wire. The following rules and figures may be useful to any one wishing to adopt the system here described: 1. The...WITH GRAMME WEIGHTS. 1. Weight of a sphere of water o.oi mm. in diameter=o.000,000,000, 523,6 of a gin. 2. Weight of a sphere of gold o.oi mm. in diameter=o.000,000,010,21... | |
 | John Mitchell (F.C.S.) - 1888 - 1002 pages
...spheres can be separated without loss of time. The following rules and figures may be useful to any one wishing to adopt the system here described. 1. The...with Gramme Weights. 1. Weight of a sphere of water 0-01 mm in diameter = 0-000,000,000,523,6 of a grm. 2. Weight of a sphere of gold 0-01 mm in diameter=... | |
 | 1894 - 458 pages
...sphere of any substance is obtained by multiplying the weight of a unit sphere of water (see 3 or 5) by the specific gravity of the substance and the cube of the diameter (Table 3 ; see also 7). 3. Weight of sphere of water o'oi mm in diameter o'uoo, od<>, оно, 523,6... | |
| |
Boracic acid is also easily soluble in water, so that the gold spheres can be separated without loss of time. The following rules and figures may be useful to anyone wishing to adopt the system here described : — 1. The weight of a sphere increases... 