Analysis of Iron Ore. 3 J 



tion, which we may mention here ; and that is, the destruc- 

 tion of a division or separation, which is common to the 

 two ossa longa of the leg of the fcetus of all the cloven- 

 footed animals, the sus genus only excepted. These 

 two bones, which in the foetus are very Well separated, 

 unite together after birth ; about the fourth week they are 

 joined together by their sides, which had been only conti- 

 guous ; and about the fifth month, the common division, 

 which separated their two cylindrical cavities, entirely disap- 

 pears, in such a manner, that of the two bones one only re- 

 mains, which is vulgarly called the cannon. 



This was very distinctly remarked by Fougeroux *, with- 

 out his being able to ascertain the cause, notwithstanding 

 the ingenious experiments made by that philosopher to dis- 

 cover it. 



Thus it is evident that Nature is as wonderful for the 

 manner in which she effects the destruction of different 

 parts, as for the great use which she derives from it, as well 

 in the perfection of our organs as in the cure of our diseases. 



V. Analysis of the Iron Ore described ly several Mineralo- 

 gists under the Denomination of Spathic Iron Ore, White 

 Ore of Iron, Spathic Iron, Ferriferous Carbonated Lime 

 nith Manganese, &c, Ore of Steel, &c. By J. J. Drap- 

 pier, Lecturer on Chemistry in the Polytechnic School. 

 Read in the National Institute of France f. 



\Jf the three specimens which were submitted to a che- 

 mical analysis, two of them formed a part of the beautiful 

 collection of the Council of Mines t. They were sent to 

 me by M. Daubisson, who very properly added the follow- 

 ing description. 



* Acad, de Sciences 1772. 



f From Annates dc Ctiimic, tome lvi. 



$ The specimens from which the fragments analysed were detached are 



numbered in the above collection rS (being that of Baigory) and ^ (being 



that of Vaunavcy;,. 



No. I. 



