138 REMARKS ON THE MAMOTIf. 



Carbonate of 3. When the white precipitate was digefted with folution of 



frfa, or potafh, car bonate of potafli, or of foda, it was diflblved, much in the 



atted very nearly r 



as pure potafh. lame manner as above related; and the properties or the lolu- 



tions, when examined by reagents, werealfo fimilar, excepting 



that the orange-coloured precipitates produced by tincture of 



galls were of a paler colour. 



Precip. by the Tungftate of potafh, molybdate of potafh, and cobaltate of 



tungftate and 7 ,• . , „ , , J . , c , . r * 



molybdate of ammonia, being leverally added to the lolution ot the white 

 potafli, and co- fubftance in potafli, produced white flocculent precipitates. 

 Hyd ? ro-fulph.' Hydro-fulphurei. of ammonia produced a reddifh chocolate- 

 am. gave redifh coloured precipitate. 



The white mat- *• ^ s tne ore was decompofed by being fufed with potafli, 



ter diflblved in the following experiment affords a curious inftance (among the 



■J??* j" d ir i° n many already known) of the change in the order of affinities 



diflblved in al- /,,,.„, r 



kali, gave, by produced by a difference of temperature, 

 mixture, a pre- Some of the folution of the white precipitate in potafh, was 

 glLl ere. ' P oure d into the alkaline folution of iron, which was formerly 



known by the name of StahPs TinBura Alkalina Martis. Pot- 

 afli wasinexcefs in both of thefe foiutions; but neverthelcfs a 

 cloud was immediately produced, and a brown ferruginous pre- 

 cipitate was depofited. 



Part of this precipitate was diflblved in muriatic acid; and 

 the folution, being examined in the ufual way, yielded a blue 

 precipitate when prufliate of potafli was added, and apurplifh 

 brown precipitate with tincture of galls. 



The other part of the precipitate was digefted with dilute 

 nitric acid ; which diflblved the ferruginous part, but left un- 

 touched a wriite flocculent matter, perfectly refembling the 

 fubftance which has been fo often mentioned. The precipitate 

 therefore produced by the mixture of the two alkaline foiutions, 

 was a combination of the white matter with oxide of iron, very 

 fimilar to the original ore. 



(To be continued.) 



XVI. 



Remarks on the Mamoth. By Louis Valentine, Phyfician 

 in Chief of the Army and Hqfpitals of America, offeveral Na- 

 tional and Foreign Societies, refident in Nancy. 



Bones of a large OINCE fettlements have increafed in North America, a 

 "undln Ame- great <l uan % of bones h »ve been found belonging to fome ex- 

 rica. tinft animal, which feems to have refembled an elephant, but 



was 



