MODE I. SIDERITE. 



others, had passed into the science before it be- 

 came classical*. 



" Mountains of black hornblende exist in Si- sites. 

 beria, Renovantz, 32 : as the Tigereck, 4 Nev. 

 Nord. Beytr. 192; and others mentioned by 

 2 Herm. 271. Frequently mixed with quartz, 

 mica, or felspar, or shorl[ and either greenish or 

 black. Ibid. But it is more commonly fpund in 

 mighty strata, as in Saxony ; or still oftener as a 

 constituent part of other primeval rocks, as in 

 syenite and grunstein; sometimes in layers in 

 gneiss, or granular limestone, or argillite ; and 

 sometimes in horn porphyry. 2 Berg. Jour. 

 1788. 508. 1 Lenz. 325. 1 Emmerling, 325; 

 or in the gullies of granite. Herm. Ibid. Horn- 

 blende slate was observed among the primeval 

 rocks on the ascent of Mont Blanc, 7 Sauss. 

 241, 253, mixed with plumbago ; Ibid, and on 

 its summit, Ibid. 289." 



" Strata of schistose hornblende occur some- 

 times in gneiss, as already mentioned. At Mil- 



* Blend, in German, sometimes implies Hind, sometimes false 

 or deceitful ; but the name seems rather to have arisen from its 

 having the appearance of blende, an ore of zinc, which was also 

 called pseudo galena. Blend, or in modern German Hind, never 

 has the final e : and there would be no sense in Hind horn. But as 

 the substance much resembles black blende, and, when struck, often 

 crumples like horn, the etymology is very clear. A French writer 

 rightly translates it Blende de corne. Hornstein and Hornsilver are 

 translucent as horn. 



