Geology. t^i 



confifi; of different fliells, and a great number of bonesi 

 Whole jaw-bones, more than four feet in length, have been 

 found in that mountain. They are fuppofed to have be- 

 longed to crocodiles. He has defcribed alfo fome fliells 

 which appear to have belonged to the common torloife, the 

 torlue franche of Lacepede, or the iejludo mydas of Linnaeus. 

 This further confirms, that the remains of animals flill ex-» 

 ifting are found among foflils. 



Denis Montfort has publiflied a memoir on a par- 

 ticular fofTil kind of the cornu ammonis, found in the en- 

 virons of Rouen and in other places. It is not of a fpiral 

 form like the common cornua ammoni?, but ftaped like a 

 buccinum. 



Villa Rs has found foffil wood on the mountain of Laus, 

 in the canton of Pifans, at the height of 2537 feet, that is to 

 to fayj 93a feet above the moft elevated line at which trees 

 grow at prefent. The trees of which foflil remains are found, 

 are the trembling poplar, birch, and common larch. 



GEOLOGY. 



Bertrand has given a new explanation of his geologic 

 fyftem. He ftill fuppofes that the globe of the earth was 

 originally a frozen mafs, and that along with motion it re- 

 ceived light, liquidity, heat, and life. 



Jens EsMARCK^ a learned mineralogift, has travelled 

 through the Bannat, Tranfylvania, and Hungary, countries ex- 

 ceedingly rich in metallic veins. He has defcribed thefe veins 

 with accuracy, and explained the formation of them accord- 

 ing to the theory of Werner, who, as is well known, thinks 

 that fuch veins were originally fiflures, afterwards filled up 

 Vr-ith minerals. But fome fa£ls related by the author feem 

 to fliow that this fyflem cannot be maintained, for at Chem- 

 nitz there are veins of from loo^to 114 feet in thicknefs : 

 at Kremnitz, the principal vein is 056 feet in thicknefs. The 

 author endeavours to fliow that thefe veins arife from th(i 

 union of more than twenty fmaller veins divided by parti- 

 tions of the rock. 



Humboldt, by the voyage which he has undertaken 

 tound tlic globc> will greatly enlarge our geological knowledge, 



becaufc 



