344 A. LIVERSIDGE. 
the gold was deposited on the sulphides in the form of minute 
prisms and six rayed stars. 
The solution used was the ordinary one employed in toning 
photographs, 2.¢., fifteen grains of the AuCl,,NaCl,2H,O to 
fifteen ounces water ; freshly fractured fragments of the sulphides 
were immersed in this and left until a sufficient amount of gold 
had been reduced and deposited upon them, as stated in the paper 
referred to; the gold was usually deposited in ochre coloured 
lustreless mammillated films, but when copper pyrites was used, 
the gold was in some cases, also deposited in minute prisms, 
. beautifully sharp and well defined; many of the prisms were 
grouped in tufts, and in the form of exquisitely arranged six 
rayed stars or in groups of three fan-like rays, the rays in both 
forms meeting at angles of 60° and resembling snow crystals in 
miniature, but of a most brilliant metallic lustre and of the colour 
of the purest gold. In other instances the gold was in the form 
of six sided plates. 
When a “ graphitic casing” from an auriferous vein was used, 
as the reducing agent, the gold was in part deposited in the form 
of minute very brilliant hexagonal plates. 
With zinc blende in one instance, a few bright apparently 
crystallised points of gold were intermingled with the dull mam- 
millary gold, also a few well defined six rayed stars and one very 
distinct St. Andrew’s Cross, 2.¢., a six rayed star with one trans- 
verse pair of rays left out, these may have been broken off or 
never formed. 
Microscopic hexagonal stars of brilliant gold were also deposited 
on mispickel and on native silver su'phide associated with mam- 
millary gold. 
On marcasite a few bright specks were deposited, probably 
incipient crystals, but no recognisable forms. 
In no case were there any traces of gold in forms belonging to 
the cubical system, although these are so readily obtained by 
