NOTES ON TASMANIAN MINERALS. 

 By W. F. Petterd. 



(Read September 14th, 1903.) 

 The present paper records the more recent results of the 

 continued investigation into the mineralogy of this State, 

 from which it will be found that not only are several unre- 

 corded localities enumerated for minerals which have been 

 previously catalogued in former contributions on the sub- 

 ject to this Society, but also that not less than 13 species are 

 now added to a remarkably long list. 



Two peculiar chemical varieties of well-known sub- 

 stances are for the first time described, both of which are 

 from one locality, and owe their unique features to a comr 

 mon cause. Several of the species are of special interesit to 

 the geologist, and a few are of commercial importance ; 

 but it may be needless to say that mineralogy deals with 

 a variety of substances usually placed under that particular 

 branch of scientific investigation, irrespective of their indi- 

 vidual intrinsic value. In fact, by far the major portion 

 but interest the geologist, the chemist, and those in search 

 of some of the most beautiful of Nature's treasures. 



So much is now known of the mineralogy of this State 

 that the flood of discovery in this particular field is without 

 doubt past, and it is only by the most strenuous efforts, 

 coupled with close application, that additions to the minerals 

 already known to occur can be made ; but, needless to say, 

 as to peculiarities of occurrence and chemical analysis much 

 remains to be done. 



I have to express my most grateful thanks to many 

 friends for ready assistance as in the past»- and generous 

 donations of both beautiful and interesting material for this 

 addendum, as weU as for facilities for collecting and oppor- 

 tunities for the examination of many minerals in situ. 



To Mr. R. F. Waller, General Manager of the Magnet 

 Silver-mining Company, who is a most enthusiastic 

 mineralogist, I am specially under obligation, both for col- 

 lecting at his particular locality, as well as for assistance in 

 the identification by blowpipe and other determinations. 



1 Albite. — {Polysilicate of ahiinhiium and sodium.) 



In solid irregular milk white subtranslucent compact 

 masses, apparently of secondary origin. Locality: 

 Heaz^ewood River. 



