Method employed to prepare Soy. 34$ 



•exotics which are reared by our gardeners in hot-houfes. 

 As they only begin to blow when their nourishment decreafes 

 and occafions a ftoppage of their growth, the fame thing 

 may happen too late in too fertile a foil, or when they have 

 a fuperfmity of nourishment. On the other hand, when they 

 are tranfplanted into foil fomewhat poorer, and into an open 

 place where they have lefs Shelter, they do not grow fo quick 

 L and fo long ; but they blow earlier. And hence it happens, 

 that many exotics planted in the open air produce ripe feeds, 

 which could never be obtained from them while they were 

 preferred as curiofities and favourites of the gardener in 

 green-houfes. I confider it, therefore, as an experiment worth 

 making, to plant thefe beans in the open fields ; and I am 

 inclined to think that in many fummers they would pro- 

 duce ripe feeds, efpecially as Jacquin fays exprefsly that they 

 throve well at Vienna in the open air. 



Should my conjecture, however, be not realifed, this 

 would not, at any rate, be the cafe with that of Bergius, 

 who is of opinion that a kind of foy might be obtained from 

 our peas and beans by the fame or a Similar procefs ; but in- 

 deed it would have this great fault, that it would be_tQQ cheap, 

 and too foon become common. 



III. Comparative View of the expanjive Force of the Steam 

 of Water and that of Alcohol. By R. PROXt. From ih& 

 Journal de l'Ecole Polytechnique. 



-L HE experiments from which the following tables are 

 deduced have been defcribed by Bcttancourt, their author, 

 in a memoir published in 1790. I gave the refults of them, 

 together with a lhort defcription of the apparatus ufed, in the 

 furt volume of my Architecture Hydr antique, in treating on 

 the general theory of the application of Steam to the move- 

 ment of machines ; but in the fecond volume, which con- 

 tains a complete defcription of fleam-engines from the firft 

 7 iu,ventioa 



