ORIGIN OF GOLD NUGGETS. 
329 
Experiment 49, with plate glass, in powder.—Before the plate 
of gold was added the glass reduced two ounces of the solution ; 
No. | 
10 
11 
12 
13 
14 
15 
16 
and on June | it had reduced the second two ounces. The plate 
increased -00005 g. in weight in fifty-nine days. 
Name of substance placed with the gold plate. eeen ees a eet ; 
Molybdenite + ‘0038 | 59 days 
Mispickel ... +0006 | 59 ,, 
5 soe +'0260| 59 ,, 
ef wa # ae +0089 | 9 ,, 
Recent iron pyrites, Loffley’s NOME eae 
Cubical iron pyrites +0028 | 59 ,, 
Iron pyrites, Joshua’s Spa. +0060 | 59, 
Iron pyrites SS -O703 19 
Iron pyrites ecalope 1 Oo 5. 
Rhombic iron pyrites or Marcasite Be ORAS HG en 
Brown hematite ... +0003 | 59, 
Limonite ... +:00025 | 59 ,, 
Rust a OOMks OO ay 5, 
Copper pyrites +°0059 | 59 _,, 
Copper pyrites.... +:°0185 | 59 a, 
Copper pyrites, Walleroo, isabel & 4206616) | (99s; 
Redruthite (copper subsulphide) +0836) 9 ,, 
Silver sulphide (argentite) +0083 |155_,, 
Fused artificial silver sulphide ... OOS2) |= 
Galena... +0049 | 59 ,, 
Galena, Broken Hill, N.S. W. 0281) |) One 
Zine lengs none DM) ks 
Zinc blende a2 O00 SG) 2OMsee. 
Graphitic casing ... none 
Graphite, Ceylon... +0001 | 59 ,, 
Charcoal ... ay + :00005 | 59 ,, 
Coal powder —'0019 | 35 ,, 
White sandstone, Pyrmont +0007 | 35 ,, 
Sandstone, reddish +0060 | 59 ,, 
Sand : al One. oO: 
Gravel, Bingera Dimond Fields, N. S. W.| —-0008 | 59 4 
Wasbh- chee Taverell; N.S. W. wale + OO0S2 On 5 
Granite, Hartley, N.S.W. +OO00G O93 
Granite, Hartley, N.S. W. +:0002 | 59 ,, 
Quartz, white... + 0002 | 59 _,, 
Clay, University Paddock +°0019 | 59, 
Statuary marble ... +:0002 | 59 ,, 
Apatite, Canada ... none /|200 ,, 
Serpentine | ae OOO li tao ms. 
Plate glass + °00005 | 59 =, 
