Mineralog. 1 Ixxvii 
in detail, have made their appearance. Oryctognosy is at pre- 
sent little better than a chaos of confusion. I wish some person 
competent to the task would set about a inineralogical arrange- 
ment of minerals. Nothing can be conceived more imperfect 
than the Wernerian classification. H auy has been more success- 
ful in determining the species. But orders and genera may be 
said to be entirely wanting in his system. 
I. ORYCTOGNOSY. 
I, New Mineral Species. 
The mineral kingdom has been examined with so much 
industry for these last 40 years, that the discovery of new Species 
must of necessity be a more difficult, and consequently a rarer 
occurrence than it formerly was. Werner, a short time before 
his death, amused himself with giving new names to several 
varieties of minerals, and constituting them into new species, 
An account of several of these, by M. Cordier and by Mr. Heu- 
land, may be seen in the Annals of Philosophy, xii. 310 and 453. 
It may be requisite to notice the most remarkable of these here. 
1. Egeran.—This mineral was named by Werner from Eger, 
in Bohemia, the place where it was discovered. By the kindness 
of Mr. Heuland, I have had an opportunity of examining various 
specimens of it. It possesses all the essential characters of 
adocrase, and must, therefore, as Cordier has observed, be con- 
sidered as merely a variety of that species, differing chiefly in 
colour and opacity. ; 
2. Albin.—This mineral, so called by Werner from its white 
colour, occurs at Mariaberg, near Aussig, in Bohemia; imbedded 
in clinkstone. Mr, Heuland has rightly observed, that it is a 
variety of apophyllite, and not of mesotypes as Cordier states it 
ito be. These two species differ from each other very materially 
in their composition ; the mesotype containmg a good deal of 
alumina, while the apophyllite contains none. The alkali in the 
former is soda, in the latter potash. { 
3. Pyrgom.—This name was given by Werner to a mineral 
found in the valley of Fassa, and already distinguished by the 
Italian mineralogists by the name of fassaite. Nothing can be 
more different than the external appearance of this mineral and 
of common augite ; yet in its crystalline form, the agreement is 
complete. Hence there can be no doubt that the two minerals 
belong to the same species. 
4. Gehlenite—This is a name given by Fuchs to a mineral 
discovered in the valley of Fassa, of which I haye given a 
description in the last edition of my System of Chemistry (vol. 
iil. p. 329). From its appearance I was led to suspect that it 
‘was intimately connected with andaluzite ; but Cordier’s conjec- 
ture, that it isa variety of idocrase, is much more probable, as is 
obvious from a comparison of the constituents of the two mines 
Tals, according to the best analyses hitherto made : . 
