26 UNRECORDED AND OTHEK MINERALS 



Analysis of a columnar and striated sample from Mt. 

 Bischoff : — 



Ag = 012 



Pb = 32-08 



As = trace 



Sb = 26-74 



Fe = 5-56 



S = 17-82 

 Si 02=14-28 



Al = trace 



96-60 



37 JoHNSTONOTiTE. — (A new mcmgancse garnet. Pro. 

 Roy. Soc, Tas., 1898-99.) 



Occurs abundantly distributed in the mica-solvsber- 

 gite of Port Cygnet. The cavities containing the 

 garnet are often lined with a thin coating of 

 purple fluor and arsenical pyrites. 



38 Knoxvillite. — {Hydrous basic sulphate of chromium, 



iron, and aluminimn.) 



Occurs as a granular sugar-like substance of a pale 

 green colour. From adit at the Victoria Gold 

 Mine, Salisbury. 



97-59 



The identification is somewhat doubtful. Associated 

 with this sulphate is another of a fibrous habit. It 

 has been found in large compact felted masses, 

 which are extremely tough under the hammer, and 

 comparatively heavy from contained hygroscopic 

 water. The fibres are minute, short, and silky- 

 white; the surface often nodular and rough from 

 protruding fine spiculae. 



