in Hot Houses. By R. Arkwright, Esq. 97 



with a less degree of heat, than when managed in the accus- 

 tomed way. 



It will be, of course, observed, that the warmth necessary 

 for the pine plants, which are kept in my house, must, in some 

 measure, counteract the process of retarding the ripening of 

 the grapes, and that the principle, which I recommend, and 

 on which I act, would be applied with more certainty, in a 

 house which was solely used for the growth of late grapes. 



I am, Sir, 

 Your obedient humble servant, 



Richard Arkwright. 



Willersley, 

 Jan. 19, 1818. 



Note by the Secretary. 

 The specimens of grapes ripened in the manner described 

 in the preceding paper, which were exhibited by Mr. Ark- 

 wright to the Society, on the 3d of February, were as rich, 

 perfect, and fresh, as if they had been produced at the usual 

 season : and the leaves, which were sent at the same time, 

 were in a state of undiminished vegetation. These leaves, 

 Mr. Arkwright has since informed us, were from the late 

 sorts of vines, viz. the Syrian, the Nice, and the St. Peter's ; 

 those of more early kinds, such as the Muscat and the Da- 

 mascus, begin to assume their yellow tinge about Christmas, 

 but their fruit continues quite fresh and good for a consider- 

 able time afterwards. The conclusion is obvious, that the 

 vines made to produce these late grapes, had acquired the 

 vol. in. O 



