Date. 
3) 
3) 
| Test No. 
Ore to be 
Cup 0 bo 
THE ORIGIN OF MOSS GOLD. 
Original Cae diy 
Dimensions. | Specimen 
—____——|_ under 
Diam.| Area. | Stress. 
sqr.in 
*564| °25 |10inches 
564) °25 Sis; 
SO) or | Or.” 3, 
"564| °25 ORT As 
"564 °25 ai ees 
ade 2 NON be. 
"564 "25 Sings 
"564 °20 Ghiray 
564 “25 By) sare 
564| -25 12. ,, 
Breaking 
Strength 
per 
Square 
Inch. 
32 tons 
32 
32 
32 
34 
40 
40 
40 
40 
41 
33 
3) 
33 
Elongation. 
Reduc- 
On In tion 
Speci- two of 
men. | inches, | Area. 
per ct.|per ct.|per ct. 
240 | 40°0 | 64°7 
2550) | 39°08 26273 
25°0 | 37-7 | 61:9 
26:0 | 38:0 | 60°6 
32°0 | 32°0 | 60:0 
20°5 | 33°0 | 57:4 
20°0 | 35°0 | 57°4 
22°71 | 340 | 58-1 
22°4 | 33°5 | 56°9 
30°0 | 30°0 | 53°6 
L—_~-—~ U—-~-— 
287 
Remarks. 
‘reqourvip ,£ ‘xeyouterp ,F 
“ToaIg Wom Jo ‘Toa7g eATdg Jo 
Ivq oo WOAJ ABQ oO WoOAT 
qno stieuttloadg + yno sueuttoedg 
Each of the specimens tested was marked off in inches, and the 
elongation per cent. taken in the total length and in the two inches 
at point of fracture, as per above sketch. 
ON THE ORIGIN OF MOSS GOLD. 
By A. LiIvERSIDGE, M.A., F.R.S., 
Professor of Chemistry in the University of Sydney. 
[With Plates XVI.- XVII.] 
[Read before the Royal Society of N. S. Wales, September 6, 1893. ] 
In 1876 I had the privilege to read a paper before this Society 
“On the Formation of Moss Gold and Silver” (Jour. Roy. Soc. | 
N.S. Wales, 1876, Vol. x., p. 125); since that time the matter 
has had to be more or less laid aside ; but as opportunity offered, 
the investigation as to the cause of the moss like form of gold 
met with during the roasting of auriferous mispickel has been 
proceeded with, and in this note the results are given of additional 
experiments which appear to afford a solution as to the peculiar 
forms assumed by the gold, described in the above mentioned 
paper. 
