Y26 BLEACHING COTTON. 



When refrac- As the cryftals laft formed muft neceffarily be impreffed, 



c / ftallize "after at t!ie P art * in co » ta6t ^ h y the peculiar forms of thofe which 



more fufible have been firft generated, it alfo follows, if the preceding 



matters, they rea foning be juft, that the in fufible cryftals may be found im- 



imcreffionof preffed by the more fufible fubftance, which cryftallized firft; 



thefelaft. an d the remaining ingredients of the mixture, which were 



fubfequently arranged, may be moulded on the refractory 



cryftals ; and thus, in the fame fpecimen, may exift a refractory 



fubftance generated by fire, impreffed by more fufible bodies, 



No cryftal more and imprefling them in its turn. From the fame confideration 



fufible than its j fc j g o h vt0USj t { iat no cr yft a l can be formed at a temperature 



can be formed above the degree of its fufibility ; and that, as a neceffary 



by igneous confequence, no cryftal which is more fufible than the bafis in 



opera ion. w j)i c h it is imbedded, can be formed by igneous operation. 



Aqueous folu- The fame laws muft regulate the arrangement of aqueous 



tion and fufpen- folutions, and of molecules fufpended in aqueous folutions. 

 fiondonotdifter ' r ^ . - 



from thofe in All thele are dependant on heat ; tor we are unacquainted 



the dry way. w j tn any fluidity, and consequently with any folution, which 



They are effed- ' V ' M / J ' 



ed by the fufienheat does not produce. Ice and loda have no more action 



©f the foli d wa- on each other than foda and quartz: raife the temperature 

 ter, once, c^ ^ e j ce ^ anf j j t un | tes w ; t h the foda; raife the temperature 

 of the foda, and it unites with the quartz. Both folutions 

 are effected by heat, of the degrees of which we know 

 neither the beginning nor the end, and are therefore utterly 

 unable to eftimate what aliquot part of its fcale is adequate 

 to the production of thefe effects. Probably a very minute 

 one. 



(To be continued.) 



XIV. 



• Account of tlie Method of bleaching Cotl&n, as praclifed at Sak- 

 burgh; and the Art of giving a permanent Red to Cotton and 

 Linen. ByM. C . Sc h o e k b i n g .* 



Salzburg method V./OTTON thread is always warned before it goes to the 



or bleaching cot- weaver# The method of wafhing here to be deleribed gives 

 ton thread, &c. . . b . ° 



it a much whiter colour than ordinary ; and it is equally appli- 



* journal of Van Mons, No. 15. 



cable 



