On lie Oil extracled from the Female Cornel Tree. 31 9 



powder of (late, pulverized charcoal, &c: but all thefe means 

 were attended with no effect; the above liquids did not be- 

 come in the leait coloured, and the green colour of the oil 

 Itill remained the fame. 



Alcohol was alfo employed. As this vehicle afTumcd a 

 greenifh tint, I thought I fhould be able by its means to 

 carry oft' the colouring matter; and I added to a portion of 

 the alcohol thus coloured, a certain quantity of water. The 

 mixture immediately became colourlefs, and fome drops of 

 oil floated on the furface of it. Having evaporated in an 

 alembic another portion of this coloured alcohol, the alcohol 

 I obtained was without colour, and there remained a portion 

 of the oil, having the fame colour as before : the alcohol, 

 then, was indebted for its colour to a folution of a portion of 

 the oil, and not to a feparation of the colouring matter. 



Sulphur combined perfectly with this oil by the aid of 

 caloric. There reful.ted from this combination a real balfam 

 of fulphur of a dark red colour inclining to brown, and of a 

 very foetid odour. 



Potafh, foda, and ammonia, formed with this oil real foap 

 more or lefs folic!. 



Concentrated fulphuric acid combined with this oil pro- 

 duced a real acid foap of a yellowifh colour, having the ap- 

 pearance of refin. 



The nitric and muriatic acids, cold, had no fenfible action 

 on this oil, but they alfumed a flight green colour. 



The nitric acid heated with this oil made it ainime a folid 

 confidence, and a yellow colour perfectly limilar to that of 

 citrine ointment : during the ebullition there was a confider- 

 able fwelling, difengageinent of nitrous gas, &c. The theory 

 of this operation being well known, I (hall forbear faying any- 

 thing re.fpecting it. 



Kot having been able to procure nitrous acid, it was im- 

 poflible for me to afeertain the inflammability of this oil with, 

 acids. 



In boiling this oil for fome time over litharge, it acquired 

 the drying property which rendered it proper for painting; 

 a property it pofletfed before its oxygenation, but in a lefs 

 degree than after it. 



By continuing the ebullition the oxide of lead became de- 

 oxidated, and was totally diffolved ; the mixture afTumcd 

 confiftence, and a brown colour perfectly fimilar to that of 

 onguent de la mere. 



The fame experiment, was repeated, taking care to add 

 water, and to fiir the mixture continually, as is done in re- 

 gard 

 6 



