104 New Procefs for making 



Grains. 

 Brought over 6959 

 coloured, and cryftallized in the mod perfcA radii, 

 feathered tranfverfely. The under furface was confi- 

 derably hone\ combed, and the concaves poflefTed mi- 

 Uutely cryftallized interiors. The mafs weighed 7°5^ 



Gained in funon 99 

 equal to -^th part nearly of the original weight of the iroa 

 employed. 



The glafs in this experiment was milky blue inclining to 

 azure ; denfe, and very tranfparent. 



The ingot was cut into three pieces, each of which was 

 drawn intc a neat bar. The caution neceffary was great, as 

 the produ6l upon the firft ojieralion difplayed an intimate 

 connexion with I'eel, and proved to be fteel very highly ia- 

 turated with carbnn. A razor and feveral penknives were 

 made from this refult, all of which hardened to cxcefs with 

 a low {hade of red. 



A fair inference from this experiment is, that the carburet 

 of iron which entered into the compofition of the crucible, 

 here united in part with the iron, and formed very highly ia- 

 turateci fteel. The precaution ufed by introducmg deacidified 

 lime haves no doubt upon the fubje6f of the carbonic acid. 



ad Experiment with black lead crucibles. Grains. 



In this experin-ent I ufed of the fame iron - 35^4 

 Vpi Of calcined lime - 440 grains. 



Old clay pot - 440 grains. 



A very beautiful button of fteel was obtained in this 

 fufion, the cryftallized furface of which was fo pro- 

 minent as to leave a very perfcft impreflion upon the 

 under furface of the incumbent glafs. The weight 

 was found to be - - - 35'^7 



Gained in weight ^^ 

 equal to vr-r-th part of the original weight of the iron. The 



OO-ro 



Duality of the fteel now obtained was fofter than that pro- 

 uced in laft experiment, and more fuitable for the ordinary 

 purpofcs to which caft fteel is applied. 



3d Experiment with black lead crucibles. Grain';. 



Swedilh iron , _ - 3630 



Calcined lime - 230 grains, 



Stourbridge clay pot - 230 grains. 



From this mixture another elegant button of metal 



covered 



