3 1 ^eiv Procefi fdt ittaUii^ 



ated or Icfs perfe6l fufioil will, I conceive, fatisfaiSlorlly AC* 

 count for. 



In order further to elucidate this fubic6l, now pregnant 

 with doubts as to the efficacy of the carbonic acid, 



Ex^. IV. wa? performed as follows : Grain=i. 



Iron introduced _ - - 146S 



Carbonate of lime - 930 grains, 



Stnurbridgt clay pot - 930 grains : 

 this proportion beiiig of each of the mixtures ^-Sths 

 the weight of the iron, and to C. Clcuet's proportion 

 as 6*25 to 3*33 ; nearly double. From this niixture> 

 ftill following his calculation, fhould have been ob- 

 tained fkel, approaching to caft iron in point of fa- 

 turation of carbon. 



The fufion was completed in 32 mihutes, and a 

 ver\' perfed cryftallized button of metal was produced, 

 which weighed - - _ _ 1434 



Loft iri fufion 34 

 equal to ^th part of the original weight of iron introduced. 



The glafs now obtained was darker by a marked (hade than 

 that obtained in experiment No i. This circumftancc, and 

 the increafed quantity of glafs, may in fome meafure account 

 for this experiment lofmg more iron than any of the former. 

 The external figure and denfity of this metallic button was 

 in noway altered from the former rcfults. It underwent the 

 fame minute examination as did buttons Nos. i and 2, and 

 in no inftance afforded the leaft perceptive difference in point 

 of quality. 



JLxp. V. was performed as follows : Grains. 



Iron introduced . _ _ 130^ 



Carbonate of lime - ]q5o grains, 

 Stourbridge clay pot - iu5o grains. 



This quantity exceecled that of C. Clouet's in the pro- 

 portion of 3 to '666, and of courfe contained nearly 

 iive times the quantity of carbonic acid. This ought 

 to have afforded a rcfult in gray caft iron. 



The fufion was completed in 30 minutes, and a 

 jnetallic button, as nfual, obtained decumbent to a 

 very ponderous mafs of glafs, and weighed - 127^ 



XiOft in ftifion, equal to ^'^th part of the Weight of the iron, 3:^ 



The glafs obtained in this experiment, upon comparifon, 



Vas found to be exactly the fame with No. 1. The great 



deficiency of weight, in the proportions of 40 to 73, may be 



accounted 



