74 VICTORIAN MINERALS,—OASE XIII. 
formation near Point Addis, Geelong, to such an amount (over 50 per 
cent.), as to render it probably of commercial importance. The beds ` 
have the appearance of a yellow sandstone. An analysis of a sample, by 
Mr. R. Daintree (formerly of the Geological Survey), the discoverer 
of the deposit, gave the following results :— 

Sulphuric acid oes se 18:278 
Peroxide ofiron  ... on 284195 
Potassa ... e.. coe 4:092 
Water of constitution beet 07985 
Water of combination «es.  0°850 
Insoluble residue ... e.. 43:350 
102:000 

Rejecting moisture and insoluble matter, 
the contained mineral gaye :— 

Sulphuric acid ... se. 32:758 
Peroxide of iron ... 47'482 
Potassa OF. ss 7:832 
Water... T 12:428 
100000 

These figures nearly correspond with an analysis by Rammelsberg 
of a yellow iron-ore from the brown coal of Kolosoruk in Bohemia, with 
the exception, that the latter contains about half a per cent. of lime in 
addition to its other constituents. 
71. Tron Pynirzs (Sulphide of | 77. Iron Pyrires (Sulphide of 
Iron), 
Catherine Reef, Sandhurst. 
Presented by R. S. Dawson, Esq. 
72. MAGNETIC Pyrires and Iron 
Pynires (Sulphide of Tron), 
Mount Buller Quartz Mining 
Company, Howqua River. 
The massive variety contains 7 dwts., 
the crystalline one, 2 ozs. 14 dwts. of 
gold to the ton. 
73° ARSENICAL Iron PYRITES. 
Map No. M 31. 
Barfold Range, Emberton. sheet 
13 S.E. 
Occurs in a quartz reef. 
74. MAGNETIC Pyrires and Iron 
Pyrites (Sulphide of Iron). 
See No. 72. 
75. TRON PYRITES. List No. A 2a. 
North of Lancefield, 4 sheet 5 
S.E. 
Found at a depth of 45 feet in a bed 
of lignite and black clay, 15 feet thick, 
in a Newer Pliocene deposit. 
76. Iron Pyrires (Sulphide of 
Iron). 
Mariner’s Reef, Maryborough. 
Occurring crystallized in cubes. It 
contains only slight traces of gold. 
‘ 
Iron). 
Mariner’s Reef, Maryborough. 
In cubes, in shales with quartz veins. 
78. Iron Pyrires (Sulphide of 
Tron). 
Campbell’s Reef, Moyston. 
From tailings from North Star claim, 
It gives on assay 84 ozs. of gold to the 
ton, 
79. ARSENICAL Iron PYRITES. 
Map No. M 30 and 31. 
Barfold Ranges. 4 sheet 13 S.E. 
In quartz, accompanied by scorodite 
occasionally. 
79s, ARSENICAL Pyritres (Mis- 
pickel). 
Whip Reef, Sandhurst, 
80. Maanrtic Pyrites (Pyrrho- 
tine). Map No. Mu 14. 
Tiverton Reef and Lisle’s Reef, 
Maldon. 4 s 
See also page 55, “Physical Geo- 
graphy, Geology, and Mineralogy of 
Victoria,” by Alfred R. ©. Selwyn 
(Director of the Geological Survey) 
and G, H. F, Ulrich (Field Geologist). 
81. PyroLusıre (Binoxide of Man- 
ganese). 
Said to have come from the Upper 
Yarra. 
