'agricultural museu:^ *§1 



5jty of the cold. They are then taken and dried in the 

 sun. For this purpose they are placed in an upright 

 posture against walls or fences The hemp taken out 

 of the water before the frost, is called winter hemp. 

 The first is the strongest; the other much weaker, 

 but the last is more pleasant to the eye, on account of 

 its being a green silver cast. Hemp does not come td 

 ijiatiuity under four months. In its first vegetation 

 rains are veiy favorable to its growth. As it ap- 

 proaches ripeness, dry and warm weather are most 

 propitious to it. Wiien the same year unites these 

 two advantages, it is sure to excel both in quality and 

 quantity. 



An essay, on the Ground Nut, as an article from which s 

 palatable and wholesome oil can be extracted. By Mr. 

 A. Boucherie, of Philadelphia, in a communication id 

 Dr. Mitchill, dated June 17, 1809. 



However rich are the productions of the American 

 continent, it was painfully acknowledged that there 

 foould not be found a fixed oil, sweet to the taste and pos- 

 sessing ull the virtues inherei:t in that of the oUve. It is 

 well known that olive oil, one of the ubstances conse- 

 c-rated to the divinities of former ages, was the delight of 

 the Greeks and Romans. Being anomted with it after 

 bathing, it maintained the suppleness of their skin and 

 of their muscles. Used in cookery it was an agreeable 

 preparation for food. That oil now forms one of the 

 richest productions of the Mediterranean shores, where 

 tile olive tree, cai-efully cuhivated, yields an oil more or 

 less agreeable, according to the nature of its soil, and the 

 process used in its extraction. 



Chemically considered, that substance essentially dis» 

 tinguishes itself by its unctuousness ; it is miscible nei- 

 ther m water nor alcohol. Putin contact with a firey 

 body it soon takes fl»uie, and when well depurated gives- 

 a lig'it much superior to that of tallow or wax, and 

 which does not tire the sight. Its constituent principle* 

 are carbon a.boatTG; ai?4 hyd,rogcn 24 parts in the hnB* 



