34 DISSERTATION ON THE 



EXPERIMENT XIX. 



After all the fluid that was left in the re- 

 torts in the last experiment had come over, and 

 the materials were left completely dry, the dis- 

 tilled fluid exhibited a milky appearance, with 

 some films floating in it ; there was scarcely 

 any appearance of oil on the surfaces. It had 

 a vegetable smell : upon being subjected to 

 experiment, with an infusion of litmus, it ac- 

 quired a red colour. Neither a solution of the 

 sulphate of iron, tartarised antimony, carbon- 

 ate of potash, acetate of lead, muriate of mer- 

 cury,' chromic acid, or nitrate of lead, produ- 

 ced any alteration. 



EXPERIMENT XX. 



Finding there rvaa- nothing but an acid ob- 

 tained from the distillation of the matei'ials, 

 and suspecting it to be the acetic, I took the 

 product of the distillation made with the 

 leaves, and saturated it with pure potash. Af- 



