Prof. Berzelius on Meteoric Stones. 44- 1 



stones, which may be regarded as having their origin in the 

 same locaUty; but three of them afford a composition so essen- 

 tially different from that of the others, that it may be said with 

 certainty that they do not come from the same spot, but ori- 

 ginate in another globe, or perhaps" from another part of that 

 globe to which we refer the remainder. These three, however, 

 resemble each other so much that we may assign them a 

 common origin. These are the stones which fell at Stannern 

 in Moravia, and at Jonzac and Juvenas in France. The first 

 was examined by Moser and then by Klaproth ; the other 

 two by Laugier. They differ from others in not containing 

 native iron, but constitute an agglomeration of evidently sepa- 

 rable minerals, as well as in that the particles of the mixture are 

 of a very small size, and that silicate of magnesia enters into 

 their composition in but very small proportion. They contain, 

 on the contrary, besides a little sulphuret of iron, silicates of 

 lime, alumina, and protoxide of iron, and also some chromium. 

 The proportion between the oxygen of the silica and that of 

 the bases is such that the former is more considerable than 

 the latter, but, however, without being double. About a third 

 of their mass (not including the silica) is, according to the 

 analysis made by Laugier of the meteorite of Juvenas, soluble in 

 acids; from which it maybe supposed that in the soluble portion 

 the silica and bases contain an equal portion of oxygen, but 

 that in the insoluble part the oxygen of the former is double 

 that of the latter, as in the meteorites already described. 

 G. Rose has carefully examined this species of meteoric stones, 

 and has rendered it probable that they are mixtures of labra- 

 dor and pyroxene, with a little magnetic pyrites free from 

 nickel, which however, according to his researches, is not at- 

 tracted by the magnet. 



The following analyses by Klaproth and Laugier show the 

 differences which distinguish these three from other meteoric 

 stones : 



Third Scries. Vol.9. No. 56. Dec. 1836. 3 G 



