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SOME NEW SOUTH WALES AND OTHER MINERALS. 317 
The crystals of apatite were separated as carefully as possible 
from the galena, but this could not be done completely, as small 
crystals of galena are seen within the apatite crystals, 7.¢., when 
sliced and examined under.the microscope. 
Mr. Harris states that pyromorphite was met with in the 
shallower parts of the same portion of the mine in considerable 
quantities. He found 3-97 of fluorine, -57/ manganese monoxide, 
and 36:25 of phosphoric pentoxide, but as all the specimens I 
examined showed enclosed lead sulphide, I do not quote his 
amounts of lead and lime; the proportions of phosphoric oxide 
and fluorine indicate that the mineral answers to the general 
formula of $ Ca,P,0,, CaF, in which part of the Ca is probably 
replaced by Pb. 
BarkLyITE—Two Mile Flat, Mudgee, N.S. W. 
Collected by the late Prof. A. M. Thomson, Sydney University. 
The specimens were in small well rolled pebbles, not more than 
¥' long. Most are of a kind of dull magenta colour and usually 
show one or two light streaks or veins, in others, the colour 
might be referred to that of lean beef. Hardness about 8°5, i.e., 
less than 9. Sp. gr. 3°738 at 18°5° C. 
The mineral is tough, and the fracture granular and of a pink 
tint, the powder is also of a pale pink tint. Before the blowpipe 
it darkens a little and returns to its former colour on cooling. 
After ignition it is a little more opaque, probably due to slight 
disintegration, When strongly heated, it becomes brilliantly 
luminous and gives a blue colour with cobalt nitrate. Large 
quantities gave the chromium reaction with micro-cosmic salt and 
borax beads. The precipitate of Al,O,3H,0, fused with NaKCOs 
gave the Dianganese reaction in one case but not in others. 
No full description of this mineral appears to have been pub- 
lished ; the name Barklyite was given to it by Mr. Geo. Milner 
Stephen, F.G.8., after the then Governor of Victoria. In a 
Catalogue of his collection, and in a lecture, he refers to 
