( 337 ) 



half an inch, an inch, or two inches, frorti 

 the enamel below. Befides thefe globules 

 a kind of thin ftreaks of enamel were at- 

 tached to the fides ; and where the neck was 

 wideft there was an accidental fwelling, 

 which formed a ring round the inner fur- 

 face. Around this ring, on the fide next to 

 the body of the matrafs, was attached a 

 very thin thread of the fame enamel. It 

 is not to be fuppofed that the enamel during 

 its vehement fufion could have rifen to the 

 places where the traces of it fo evidently 

 appeared ; fince then the fides would have 

 been varniflied over with it ; as we fee in 

 crucibles in which the melted matter has 

 rifen and funk again. Here, on the con- 

 trary, the fides of the matrafs, in the places 

 between thefe ftreaks, were as perfedlly free 

 from any appearance of enamel, as they 

 were before the expetiment Was made. I 

 then could not but recoiled: the experiment 

 of Lavoifier, and others, of a plate of gold 

 filvered over by expofing it to the fumes of 

 filver exhaling by the adion of a vehement 

 fire ; as alfo another, its companion, in 

 VOL. III. Z which 



