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The Spot affecting the berries seems to be the 

 same disease as shanking, only affecting a different 

 part. Like this disease, it is a gangrene, and is 

 probably occasioned by an irregularity in the supply 

 of moisture and vicissitudes of temperature, but es- 

 pecially if one of the extremes is much below the de- 

 gree of heat most favourable to the healthy growth 

 of that plant. The reason of this is very obvious. If 

 any plant be placed in a highly stimulating heat, and 

 is abundantly supplied with root moisture, it imme- 

 diately increases its surface of leaf and fruit. If this 

 amount of sap is subsequently suddenly reduced, by 

 lowering the temperature, and adding water to the 

 soil less freely, the increased surfaces are no longer 

 required, and it is a law pervading all the vegetable 

 creation, that the moment any of the parts of a plant 

 are unnecessary to it, that moment they begin to de- 

 cay. "We placed a plant of the Marvel of Peru, or 

 Heliotrope, in a high temperature and abundant 

 moisture; these were then much reduced, and the 

 leaves in a few days were completely decayed round 

 their edges, and in spots upon their surfaces. The 

 extent of leaf was accommodated to the amount of 

 sap to be elaborated. (Princ. of Gard.) 



Muscats are particularly liable to the spot. Our 

 opinion that sudden vicissitudes of temperature are 

 the causes of this disease, seems to be well sustained 

 by the fact, that the parts nearest the glass, that is, 



