I96» On the Fiijton of MalhahU Iftin 



lead. Under the iron was fotind of revived- lead 378 graifftf> 



1 

 equal to — g-th part the weia;ht of the fiirtt glafs. _ . 



^ 4y,; r & o Grams. 



£.v/. Vir. SwetUni iron - - &83 



Crown window glafs - 883 grains. 

 From thrs mixtin-e rclulted a very complete fufion. 

 The metallic button was minutclv but regularly cryf- 

 tallizcd upon its upper furface. I found it to weigh 868 



I 



Loft in fufion 14 



equal to — -fth part tlie original weight of the iron employed. 



The frafture of this metal was filvery white, parting in la- 

 ninre, deftitute both of fibre and grain. This appearance 

 was quite new, and more like zinc than any fra£lure of iron 

 I had ever before leeu. Suffice it to fay, that when fubjefted 

 to trial its quality was preeifely the fame as found in the 

 former refults. The glafs was light green, rcfembling that 

 of No. HI. Grains. 



Exp. VIII. Swedifli iron - - 560 



Window glafs double in weight, or 11 20 grains. 

 This mixture was reduced to a perfeft fufion, and a 

 crvftallized button of metal obtained marked with 

 various prifmatic fliades. It was found to weigh 553 



Loft in fufion 7 

 equal to ^\,th part the weightof the iron. Thefrafture of this 

 button was granulated, and in point of appearance and luftre 

 tliffered conliderably from No. VII. It drew, however, eafily 

 into fhape, and felt foft and very du6lile under the hammer. 

 I ventured to double-wcid the end of the bar; which it ftood 

 prettv well, a few edge cracks excepted. The glafs was of 

 a bUieifli green cafi, abounding with waving lines of a. faint 

 garnet coKiur. Thin fragments, however, difplayed a grafly 

 green, coufiderably tranfparent. 



It feems decifive, from thefe experiments, that the quality 

 of the mttal obtained by the fufion of bottle glafs, flint 

 glafs, and cro\,-n glafs, with the lame quality of iron, was 

 produAive of exaftly fimilar refults to thole deftribed in for- 

 mer papers, where Swedifli iron was ufed with various pro- 

 portions of argil and carbonate of lime. None of thcfe pro- 

 <lu6fs exhibited any properties of fieel, but all of them con- 

 fiderably altered. 1 he caufe of alteration fiill remains to be 

 developed. If glafs has an afiinity to iron, this mult have 

 been exerted in all thefe fufions alike, whclher the glafs was 



introduced 



