GEOLOGICAL SOCIETY OF PENNSYLVANIA. 



215 



I am favoured with an analysis of the purest quality 

 of this stone, by J. W. Alder, Esq. 



Carbonate of lime, ' . . . . . 89 



Silex, 7 



Alumine, ....... 3 



Iron, 1 



100 



The trial v^as made on 415 grains of the limestone ; 

 the separate parts of which were reserved dry, with only 

 a loss of 1| grains; so that the decomposition must have 

 been very complete. By this, and a previous experiment 

 affording nearly similar results, it appears that this lime- 

 stone of Blossburg is more pure, and contains less silex, 

 than was anticipated. Its applicability as a flux for 

 making iron has not yet been tested, but it is proposed 

 to employ it for that purpose here and at the projected 

 iron works of Lycoming creek. 



A specimen of this limestone being handed to Mr 

 Clemson, he has furnished the following remarks : 



' ' It consists of amorphous masses of a dirty grey colour,, 

 and appears much mixed with foreign matter. Its com- 

 position per cent is — 



Water, . . . . . . . 3.2: 



Argil, sand, &c., insoluble residuum, . . 53.8 



Precipitate with lime water (no iron), . . 12.2 



Carbonate of lime, by difference, . . 30.8 



100.0" 



The discrepancy between these analyses, arises, pro- 

 bably, from variation in the nature of different portions 

 of the conglomerate limestone. 



