THE CULTURE JDF THE GEAPE. 101 



opinions of some practical people, extracted pri.. cipally 

 from Loudon's Magazine : — 



Yol. 10, page 19, a writer thinks it caused by too great 

 heat at night. 



Page 267, an experienced grape-grower thinks it caused 

 by damp, and recommends a good fire in the daytime, 

 and to give abundance of air, to expel it, by which means 

 the moisture evaporated is carried off. 



Page 137. Mr. J. D. Parkes, F. II. S., Nurseryman, 

 Dartford. " A variety of causes have been assigned for 

 that disease in forced grapes which produces a shrivelled 

 appearance in the footstalks of the bunches, more espe- 

 cially in the Frontignans and Muscats. Some considei 

 that it proceeds from the roots being too deep in the 

 ground ; others think that it is occasioned by the temper- 

 ature of the earth in which the root grows (when vines 

 are planted outside the house) being so much lower than 

 that of the .atmosphere within ; and some attribute the 

 disease to a want of air. 



"Having observed that early-forced grapes are, in gen- 

 eral, free from this disease, and that it never occurs to 

 grapes grown in the open air, and having found, in a 

 house under my care, that some bunches immediately 

 over a steam-pipe were free from it, I have come to the 

 conclusion that the cause is stagnation of cold moist air ; 

 and the remedy, the application of artificial heat, to such 

 an extent (even in siimraer, when the weather is cloudy,) 

 as to admit, every warm day, of opening the windows 

 sufficiently to occasion a free circulation of air. A gar- 

 dener, to whom I stated this as my opinion of the sub- 



