130 MR HAIDINGER on the Natural-Historical 



nerals, which are capable of being expressed by numbers, for 

 they must uniformly appear the same, to all who examine them 

 with the necessary accuracy. WERNER'S collection at Freyberg, 

 contains as granular Actinolite the varieties from Corsica, those 

 from the valley of Saass, at the foot of Monte Rosa, and those 

 from the Bacher in Stiria. It is to the last of these that the epi- 

 thet of " granular" more particularly refers. KARSTEN * assumes 

 the varieties from Corsica as a particular species he calls Schma- 

 ragdite, which, however, he mentions as including only a part of 

 the Smaragdite of SAUSSURE, the other belonging to chatoyant 

 Hornblende (diatomous Schiller-spar). He was thus forced to 

 acknowledge the high degree of resemblance among the less 

 distinct varieties of Smaragdite and common Hornblende. In 

 the same manner STEFFENS f enumerates in his system a 

 particular species, of which the Smaragdite of SAUSSURE forms 

 the most distinct variety ; yet this author confesses himself un- 

 certain with respect to an exact natural classification, in regard 

 to that species, and to those of the genus Schiller-spar in ge- 

 neral, and therefore gives his determination merely as a tem- 

 porary one, till further researches should decide its correct- 

 ness. An opinion widely different from the preceding is en- 

 tertained by HAUSMANN. His system joins in the substance 

 Heterotype, the formations of Hornblende (hemiprismatic Au- 

 gite-spar), Diallage, Bronzite (hemiprismatic Schiller-spar), 

 Hypersthene (prismatoidal Schiller-spar), Anthophyllite (pris- 

 matic Schiller-spar), together with several others that be- 

 long to the natural-historical species of hemiprismatic Augite- 

 spar. As farther subdivisions, Diallage contains the follow- 



Tabellen, 1800, p. 70. ; 1808, p. 40. 

 f Handbuch, Th. i. s. 326. 

 * Handbuch, Th. ii. p. 712. 



