48 SEVENTH REPORT—1837. 
S.W. The mine water is strongly cupreous, and deposits a slimy 
sediment of iron, and organic matter, probably “Glairine.” In this 
slime, and adherent to the timbering of the mine, the crystals of pure 
malleable copper were found in considerable quantity. The mine 
water from whence these masses were formed, has a specific gravity 
of 1:032, at 58° Fahr. When evaporated to dryness, it leaves a horny 
residue, smelling of animal matter. It contains the mixed sulphates 
of copper and iron. 
Amongst the many forces in operation to produce this metallic 
aggregation, the author suggests the possibility of galvanic action, 
‘between the lode and the timbering of the mine; having found the 
galvanometer much affected by a small series of plates of grey copper 
ore, and of fir timber, saturated with solution of sulphate of copper 
under the air pump—the exciting fluid being the water of this mine. 
The slime appears to act the part of Becquerel’s clay plugs, or Wach’s 
diaphragms. 
The author also presented a specimen of native sulphate of copper 
and iron, from the same mine ; from the ochrey slime at the bottom of 
a shaft of fifty fathoms deep, which had been full of water for above 
acentury. It is found in small, brilliant, blueish green, rhomboidal 
crystals, and consists, according to the author's analysis, of— 
Sulphate wf rome wed rete hick tie penne 34-2 
Sulphate of Copper s...2. 00) cesissas - dvsness JOO 
99°9 
This analysis does not present any exact atomic proportion between 
the two salts, taking the atom of sulphate of copper to weigh 15°62 
as determined by Dr. Thompson, and containing five atoms of water ; 
but it is remarkable, that if the sulphate of copper be supposed to be 
the green sulphate, which contains but one atom, and has an atomic 
weight of 11°12, the above analysis will correspond to three atoms of 
green sulphate of copper, and one atom of sulphate of iron. In favour 
of this view is the circumstance, that these crystals were formed at a 
considerable depth, and consequent high temperature ; and that it 
is by similar means that the green sulphate of copper is artificially 
formed. On the other hand, while the common sulphate of copper is 
isomorphous with the sulphate of iron, that which has but one atom 
of water is not so; it crystallizes in right prisms, while the common 
sulphate of copper assumes the form of the double oblique prism. It 
is possible, however, that the crystalline form of the green sulphate 
may be modified by the presence of the sulphate of iron. 
Ona new Chemical Compound. By Dr. Arsoun. 
This new and very complicated compound, including iodide of 
potassium, iodine, and what Dr. Apjohn denominated Cinnamile, from 
its analogy to benzoyle, the hypothetic base of the essential oil of 
almonds, was exhibited to the Section. The compound was formed 
