Cajl Steel ffom Ear Iron. 25 



which T fliall bring forward relative to the various parts of 

 this theory, as formerly ftated, will bear certain evidence 

 that the whole had been founded upon one leries of experi- 

 ments, the juftncfs of which may be gathered from what 



follows. Grains, 



Exp. r. Four pieces of malleable iron, weighing 1457 

 \vcrc introduced into a Stourbridge clay crucible, and 

 the following mixture added, being the exact propor- 

 tions pointed out by Clouet: 



i-3d of Halgrochan raw lime, or 486 grains; 

 I -3d of Stourbridge clay (old jwt), or 486 grains. 

 The pieces of iron were imbedded in, and completely 

 covered bv, the mixture of earths. The Crucible was 

 expoled for 35 minutes to a high heat, when the mix- 

 ture was fuppofcd to be reduced. The refult was a 

 line dark creen glafs, tranfparent towards the edges, 

 covering a pcrfe«it regulus of metal. Upon clofe exa- 

 mination, a few traces of imperfed cryftaUiiiation were 

 vidble upon the upper furface. The under furface wars 

 marked with deep pits or honey-combs, but nothing 

 which betokened anv great degree of divifion having 

 taken place while the metal was fluid. — This product 

 weight - - - - 1437 



Loft in fufion 20 

 equal to J,d part the weight of the iron introduced. From 

 the dark colour of the glafn I inferred that a quantity of iron 

 equal to the deficient weight might eafily be difltifed through- 

 out the mafs. 



The quality of this metallic button was minutely examined, 

 and the following charaiteriflics rigidly afcertained : 



The mafs was partially cut acrols with a chifel, and with 

 difficulty broken cold over an anvil. The fracture difplayed 

 a confiderable quantity of fibre ; a few rmperfecl granulations, 

 *)f no determinate form, were alfo vifible, but polfefied of a 

 fmall degree of comparative ludre. One-half of the buttor^ 

 v/as forijed at a cherry heat. It drew into a fquare fhape with 

 facility; but the action of the hammer, even at this low 

 heat, exjjrcflcd a confiderable number of fparks. The folidity 

 of the bar, notwithftanding the fuilon, was far from being 

 complete. At a high red heat, a flight hamnierino; difiipalcd 

 the particles of metal like cafi iron. 



One end of the bar was jilunged into water at the ordinary 



heal for fteel. 'f his produced no alteration, and the bar bent 



feveral times without breaking. When again hammered, it 



was plunged at a bright red : Uie furface ihea flialsd a little, 



4 and. 



