374 N^^ ^N° EXPEDITIOUS MODE OP BUDDING. 



least from the surface of the body, is more considerable, 

 tlian is requisite to furnish the increased evaporation„ 

 Svreat. Hence that sweat, which, in most cases, is nothing more 



than the excess of the fluid perspired above that carried off 

 by evaporation. 

 General deduc- I shall conclude this paper with the following proposi- 

 '''*"■ tion, which I think I may venture to advance as a neces- 



sary consequence of the observations contained in it. " The 

 production of cold, manifested in animals exposed to a 

 high degree of heat, is the result of the evaporation of the 

 perspirable matter; which, in consequence of the increased 

 action of the exhalant system, is so much the more con- 

 siderable, in proportion as the external heat is greater. It 

 is therefore at the same time the result both of physical and 

 vital causes." 



VII. 



A new and expeditioifs Mode of Budding. By Thomas 

 Andrew Knight, Esq. F. R. S*. 



Nurserymenapti ARKINSON, in hisParadisus Londoniensis, which was 



to substitute published in 1629, has observed, that the nurserymen of his 



onefruitforan- % , ,, , • ^i i- ^ ^ . . 



other. days had been so long in the practice oi substituting one 



variety of fruit for another, that the habit of doing so was 

 almost become hereditary amongst them : were we to judge 

 from the modern practice, in some public nurseries, we 

 might suspect the possessors of them to be the offspring of 

 intermarriages between the descendants of those alluded to 

 by Parkinson. He has, however, mentioned his " very 

 good friend, Master John Tradescant," and " Master John 

 Miller," as exceptions; and similar exceptions are, I be- 

 cause of mis- lieve, to be found in modern days. It must however be 

 ^^^^' admitted, that, wherever the character of the leaf does 



not expose the errour of the grafter, as in the different va- 

 rieties of the peach and nectarine, mistakes will sometimes 

 occur; and therefore a mode of changing the variety^ or 



* Transactions of the Hort. Soc. vol, i, p. 194. 



of 



