Cast Iron, Steel, and Malleable Iron. 

 For 35 Grains of those irons. 



577 



Gray 



Ingredients. French 



i Iron . 



White 

 Welsh 

 Iron. 



Creuzot 

 Iron. 



Iron (a). 



Iron (6). 



Iron (c). 



Speci- 

 men {d). 



steel. 



Residuum 

















in acids. . 5-53 



6-7700 



12-005 



10-890 



16-625 



9-45 



10045 



1-995 



Increase of 



















weight 



















after ig- 



















nition .... 



0-000 



0-9084 



2-697 



0-385 



1-880 



1-82 



0-880 



0-059 



Flocculent 



(lost.) 

















powder 



















after boil- 



















ing with 



















hydro- 



















chloric 



















acid 



4-762 



0-6270 



1-603 



2-316 



2-036 



0-485 



2-044 



0-381 





gray. 



gray. 



gray. 



gray. 



black. 



black. 



black. 



gray. 



Table inclusive of the increase of weight in the different 

 states of iffnition. 





Gray 



French 



Iron. 



White 

 Welsh 

 Iron. 



Creuzot 

 Iron. 



(o). 



(J). 



Loss. 



steel. 



1st 



0-000 



0-173 



0-000 



064 



0-1454 



1-14 



0-059 



2nd 



0-000 



0-584 



0-450 



0-209 



0-8000 



1-16 



0-000 



3rd 



0-000 



0-043 



0-846 



0-096 



0-560 



0-80 



0-000 



4th 



0-000 



0-000 



0-810 



0016 



0-218 



0-00 



0-000 



5th 



0-000 



0-000 



0-210 



0000 



0000 



0-00 



0-000 



6th 



0-000 



0-000 



0-162 



0-000 



0-000 



0-00 



t 0-000 



7th 



0-000 



0-000 



0-144 



0000 



000 



0-00 



0-000 



8th 



0-000 



O'OOO 



0-018 



0000 



0-000 



0-00 



0-000 



9th 



0-000 



0-000 



0-054 



0-000 



0000 



0-00 



0-000 



10th 



0-000 



0-000 



0-000 



0-000 



0-000 



0-00 



0-000 



If we treat powdered iron with a current of dry chlorine, a 

 qnantity of silicon is always retained by the remaining car- 

 bon and azote ; and this is likewise a proof that a certain 

 quantity of silicon is chemicall}' combined with the carbon, 

 as no alkali has the power to extract it*. 



* In specimens in which the silicon is combined with the iron, the silicon 

 is left after the solution of the iron in acids, in the form of a white and 

 somewhat gelatinous granulation, as we saw in the gray iron from Vienne. 

 On the contrary, where the carbon is combined with tlie silicon in not too 

 large proportions, even a white heat is insufficient to bm-n this carbon, as 

 we had examples in the black second remainders of the iron, (A), (c), and 

 id). 



