SCIENTIFIC COMMITTEE, JUNE 12. 



xxvii 



died from the same disease, and the others are affected more or less 

 in the same way. It will be observed from the photo, that the 

 diseased growth is gradually spreading all round the trunk of the 

 tree, and will eventually choke it (as has been the case with the 

 others) by preventing the natural flow of the sap. I may say 

 that the subsoil here is in some parts gravel, and in others blue 

 lias clay. The trees were planted over both, and were all grafted 

 just above the ground. Six years ago it was thought that if we had 

 trees on their own roots they might not be subject to the disease; 

 accordingly some good nuts were gathered from the best of the 

 trees, and a number of seedlings were raised. Most of them have 

 flowered this season. Of the flowers some are inferior, others 

 equal, and others superior to those of the parent. The ordinary 

 white-flowered Horse Chestnut is quite free from any disease, as 

 are also the Pavias." The specimens were forwarded to Prof. 

 H. Marshall Ward for examination and report. 



Asparagus Fasciated. — Mr. Kitchen, of Hampton, sent a 

 specimen of this extremely common phenomenon, with the end 

 spirally twisted into a helix. 



Polygonum Leaves marked by Frost. — Mr. Henslow showed 

 leaves received from Wiltshire having two colourless longitu- 

 dinal bands. Every leaf on the tree was said to be similarly 

 marked. It was attributed to the frost catching the young leaves 

 just where they were exposed on unfolding. 



