80 



MINERALS AND GEOLOGY 



Note : A plumbiferous variety of Antimony Glance, apparentb 

 a mixture of that ore with Zinkenite or Jamesonite, has been sent 

 to me Jately from Belleville, with the intimation that it was obtained 

 in Elzevir. It forms small fibrous or sub-fibrous masses, intimately 

 mixed with calc-spar, and with numerous acicular crystals of Tre- 

 molite, and some massive Hornblende, in quartz. Partially soluble 

 in caustic potash, hydrochloric acid precipitating orange-coloured 

 flakes from the solution. 



26 bis. Menighinite : Lead-grey ; H=2.5 ; sp. gr. 6. 33. Easily 

 fusible with antimonial fumes. Contains sulphur, antimony and 

 lead. Occurs near Marble Lake, Township of Barrie, Ont., (Dr. B. 

 J. Harrington, Trans. Roy. Society of Canada, 1883). 



26. Red Antimony Ore (Kermesite) : Dark cherry-red, somewhat 

 lighter in the streak ; lustre adamantine, or approaching semi- 

 metallic. Monoclinic in crystallization, but occurring almost always 

 in small radiating fibrous tufts, associated with Antimony Glance. 

 H=1.0 1.5, sp. gr. 4.5. 4.6. BB, melts on the first application 

 of the flame, and becomes rapidly volatilized. The composition is 

 somewhat remarkable, presenting the union of a sulphur and oxygen 

 compound. One hundred parts contain : sulphur 19.8, oxygen 4.9, 

 antimony 75.3. 



Occurs in small feathery masses, with Native Antimony and 

 Antimony Glance, in the Eastern Township of South Ham. 



III. OXYGEN COMPOUNDS. 

 [This sub-division comprises the various Oxides of natural occur- 

 rence, i. e. combinations of oxygen with various metals ; and also 

 the ternary oxygen compounds, or so-called oxygen salts, commonly 

 regarded as combinations of an oxygen acid (silicic acid, carbonic 

 acid, &c.) with an oxidized metallic base (lime, magnesia, alumina, 

 iron oxides, &c.). These latter compounds form the groups of Sili- 

 cates, Carbonates, Sulphates, and so forth. See the remarks 

 Chemical Nomenclature in Part 1., and also the observations p 

 fixed to the various groups below.] 



A. COPPER OXIDES. 



27. Red Copper Ore (Ruby Copper, Ruberite, Cuprite) : Red, 

 with red streak. Normally, in Regular crystals (chiefly the octahe- 

 dron and rhombic dodecahedron) which are commonly converted on 



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