asOhjeElsof the Arte fDyingt &t. 355 



From one pound, avoirdupois, of vvool^ he 

 obtained by diftillation, one ounce, fix drachms of 

 Volatile alkaline fait, feven ounces of fwerous 

 fpirit, and two ounces and half of empyreumatic 

 oil. The caput mortuum weighed three ounces^ 

 fix drachms, of which two drachms were difllpated 

 by calcination. 



Silk yielded, from a fimilar weight,' nine 

 ounces of mixed matter, confifting of four ounces3 

 two drachms of urinous fpirit; three ounces, 

 fix drachms of volatile fait, and one ounce of 

 empyreumatic oil. The refiduum weighed feven 

 ounces ; loft one ounce on calcination, and then 

 afforded, to water, forty grains of fixed faline 

 matter. 



Cotton did not yield the fame foetid fmell 

 as wool, when burned in the open air, nor any 

 urinous fait or fpirit in clofe vefi^els. A pounds 

 avoirdupois, of cotton gave over, on diftillation^ 

 feven ounces of an acidulous, fuliginous, oily 

 fpirit, and about ten drachms of an empyreu- 

 matic oil. The remaining coal was reduced, 

 by calcination in a crucible, to eight fcruples 

 of white afties, which afforded a fmail portion 

 of fixed alkali.. Monfieur Berthollet, a very in- 

 genious French chcmift, has lately analifed thefc 

 fubftances in a different manner.* 



On diftilling filk with nitrous acid, he obtained 

 faccharine acid, and a greafy matter i which, 

 • Journal de Phyfique, vol. XXIX. part II. 



A a ?. though 



