tu'ttb various Kinds of Glafs, igy 



»litroduced already formed into the crucible, or afterwards 

 produced by the fufion of one or more earths. In all, fimilar 

 <leficiencies of weight have been experienced. This accords 

 «ot with a conibinaiioa of glafs, which ouirht to have added 

 v/cight to the refults. 



Ha\ing thus minutdy ftated the refults of various experi- 

 ments here detailed, and claired their qualities with that of 

 others obtained by different mixtures, and connnunicated in 

 two forn^er papers, I fl?all next exhibit fume experimenis 

 with Britifli eold-fhort iron, wherein fome reiulls approach 

 very nearly to that dcfcription of ca// mulh-aJ L iron dcfcrlbed 

 by Clouet as combined with glafs, antrincapable of diitcnd- 

 mg under the hammer. Grains. 



Exp. IX. Britifh cold-fhort iron - - j-ro 



Bottle glafs - 1750 grains. 



There refulted from tlie fufion of this mixture an ele- 

 gantly crj'ftallized button of iron^ weighing - 1662 



Loft in fufion, equal to — j-th part, S? 



This button, without being broken, was put under the ham- 

 mer, but would not draw into Ihape at the lowell red heat. 

 Again this w;is repeated as follows : iiv/i.s. 



-Gt/. X. BritiOi cold-fliort iron - - 3^00 



Bottle glafs - 3500 grains. 

 A very perfect fuUon alfo refulted from this mixture. 

 The button was Icfs perfc6lly cry ftallized, and weighed ^-^ 20 



I^ft in fufion, equal to — 5-th part, 180 



This mafs was alfo found to be utterly incapable of 

 diflenfion under the hammer at any degree of heat. 



,, v'T ■¥•»•• /I Grains. 



l:jxp,Xl. Briljflicold-fliort iron - - gy^ 



Bottle glafs - 875 grains. 

 Another elegantly cryllallizcd button was here ob- 

 tained, which weighed - _ 3-) I 



Loft in fufion, equal to ■ — j-th part, 44 



This button was^ as incapable of hammering and diftenfion 

 as the former. The accuracy of tliefe refults may be inferred 

 from the rtfpc»5tive deficiencies of the weirrht. The quality 

 of the whole feems to be nearly that defcriGed by Clouet. 

 ., / (irains. 



/•.••/'. Ml. Rrilifli cold-fliorl iron - - 875 



15oltlc glaf'^ - 437; grains. 



^^' ?, A very 



