BY W. F. PETTERD. av 
The surface often has numerous adherent crystals of Crocoisite 
which not rarely penetrate the mass. These crystals are always 
minute, but remarkable for their extremely fine development and 
acute angles. 
The q ualitative reactions of this new substance ure as follows :— 
In the matrass it becomes yellow and yields water. It is infusible 
before the blowpipe, but on coal, with ‘fluxes, yields a considerable 
quantity of metallic lead, and coats the surface with the 
characteristic yellow sublimate. When moistened with sulphuric 
acid it gives distinct reaction for phosphoric acid. {n nitric acid 
it dissolves with strong effervescence ; the residuum from the solution 
strongly deflagrates and gives phosphoric reaction. The powdered 
material, when moistened with cobalt nitrate, clearly shows the 
beautiful blue colouration of alumina. With limewater gives the 
turbidity of carbonic acid. Hardness about 2. 
Adelaide Proprietary mine, Dundas. 
83. EPIDOTE (Silicate of Iron and Calcium). 
This species frequently occurs in richly metalliferous rocks, and 
in a lesser degree it is widely diffused. It is usually of a peculiar 
and characteristic pistachio-green colour, but it often affects a 
reddish-brown colour when occurring in Serpentine. Common in 
greenstone, west of the River Leven and other places (J. Smith) ; 
abundant in clefts of rock, Magnet Range; near Table Cape; 
about the Forth River ; vicinity of Bischoff ; with quartz as veins 
in the greenstone, usually occurs in bunches of crystals—some of 
the individual specimens often met with up to an inch in length, 
Dunyan Range, Duck River; Woolnough, of clear colouration 
but small size; at Port Cygnet a black variety has been obtained 
in long bladed, thin, semi-crystallized bunches, which are fairly 
abundant in a felspathic porphyry ; at the Whyte River it has 
been found in the clefts of lode material with bunches of Calcite 
and Pyrites; at Dandas it is fairly abundant in quartz. 
84. EVANSITE (Hydrated Phosphate of Alumina). 
A rare species, occurring as botryoidal incrustations, which are 
often almost colourless, but sometimes milky white, at all times 
having an attractive pearly lustre. Jt appears to differ from the 
typical form in having a proportion of Silica chemically combined. 
The examples were obtained in a silver-lead lode with Galena 
and Sphalerite. 
Zeehan. 
85. EPSOMITE (Sulphate of Magnesia). 
Found as sub-crystallized aggregated and delicately fibrous 
masses, but also commonly as a more or less compact incrustation. 
It occurs in caverns and fissures. Abundant in the neighbour- 
hood of the Dromedary Mountain; about the Upper Lake River, 
