igS On the Fujion of Malleallc Iron 



Grain?. 

 Brought over 875 

 A very fine cr3'ftallize(] button was obtained from this 

 mixture, which weighed _ _ _ 808 



Lofi: in fufion, eoual to ,yth part the weight of iron, 67 

 The fra£lure of this outton was completely delHtute of grain, 

 laminated, fmooth, and of a filvery white colour. With 

 much caution one-half of it was drawn into a fmall bar; but 

 in endeavouring to form it into a point, it became loofe, and 

 incapable of further diftenfion. It felt confiderably harder 

 under the hammer than the produAs from Swedilh iron. 

 This refult, upon the whole, was more ducElile than any of 

 the former, and the quantity of elafs ufed lefs. Grains. 



Exp. Xill. BritiHi cold-lhort iron - - " 875 



This was expofed per fe to a verv high heat, and a 

 perfeft button of metal was obtained covered by a thin 

 film of brown glai's. The iron weighed - 80^5 



Loft in fufion, equai to — ;^th part the weight of iron, 70 



This button poflTeiTed a brilliant, flat, granulated frafluie. 

 One-half of it v/as drawn into a very folid bar poflefling duc- 

 tility and foftnefs in an eminent degree. The quality of this 

 iron was fo completely cold-ftiort before fufion, that a ftout 

 bar of it was eafily broken by a blow from a hand hammei;. 

 It now pofTefled the oppofile extreme of red-fliort, and was fo 

 pliant when cold, that a bar nearly 'ths fquare folded clofe 

 by the comprclTion of the vice, and afterwards opened fairly, 

 and was bent backwards and forwards feven times before it 

 cracked. GrBins. 



Exp. XIV. Britifli cold-fhort iron - - 500 



Bottle glafs - 1000 grains. 

 A very beautifully cryltallized button was obtained by 

 the fufion of this rni^^ture^ which weighed - 473 



Loft in fufion, equal to -r-trth part of the weight of iron, 27 



The fracture oi this iron difplayed a double row of verv perfe£^ 

 cubes inferted in each other. The colour was a filky light 

 blue, not lo dazzling as in the former experiment. One-half 

 of this button was fmooth filed upon the fraiSture, and forged 

 at a low heat, to endeavour, if poilible, to obtain a foiid bar. 

 It however cracked conlidcrablv, and became loofe and flialy. 

 The hardened fracture poffened a flat, crowded, indiftin6l 

 grain, of a dazzling filvery colour; the fur face turned up a 

 gray fpotted fhale, refembling thai of caft fteel. 



It 



