VOL. LII.] PHILOSOPHICAL TKANSACTIONS. 525 



ments on several other young trees ; some that had not yet borne any fruit, and 

 others that had borne but a small quantity ; particularly two young pear-trees, 

 that never yet had any bloom. He treated the main arms of one of these in the 

 manner already described, and also several of the branches that grevi' on these 

 arms ; likewise one of the arms of the other pear-tree. The first of these bore 

 a surprizing quantity of fruit last summer; and the circumcised arm of the other 

 bore a moderate quantity, though no other part of the tree had any appearance 

 of bloom. 



He made also the following experiments on two branches of different young 

 apple-trees, as nearly of the same size as he could find. He cut ofi^ the bark of 

 these as exactly as he could by a guage; changing them, and putting the bark 

 of the branch of one tree on the branch of the other. A small slip of wood came 

 off with the bark of one, and the bark of the other had a leaf-bud on it; which 

 branch had also 2 apples growing on it. The bark of each of these healed per- 

 fectly, and the apples remained on, and ripened with the rest: the leaf-bud 

 pushed forth leaves, and both the branches bore so very plentifully the last 

 summer, that one broke down with its load; and the other would also probably 

 have sufiered the same fate, but that he had it supported. These were both 

 nonpareil apple-trees planted in asparagus beds. 



He changed the barks of the branches of a peach and a nectarine tree : that 

 which was placed on the peach-tree healed perfectly, and the branch produced a 

 quantity of bloom last season ; but the bloom of the whole tree, as well as of 

 several others against the same wall was entirely blasted. The gardener cut ofF 

 the branch of the nectarine when he was pruning, and nailing the trees, as he 

 did of several others, on which had been made experiments of the same kind; 

 against which he declared his opinion strongly at the time of making. 



About the beginning of November last, Mr. F. cut off' one of the arms of the 

 perdrigon plumb tree, which had the experiment made on it in 1758, to examine 

 what effect it had on the wood ; to which he found the bark between the circum- 

 cisions more firmly united than in any other part. There was a dark vein, 

 which ran through the wood in that part which appeared of a harder texture than 

 the rest of the branch. 



JCIIL Of the Urtica Marina * By Joseph Gaertner, M.D. p. 75. 



Having lately visited the southern coasts of Cornwall, Dr. G. met with several 

 new and undescribed sorts of the urticae marinas, called by Mr. Hughs the ani- 

 mal flowers. The name of urtica, as the celebrated M. de Reaumur justly ob- 



* The animals described in this paper belong to the genus Actinia, and are in some degree allied 

 to hydrae or polypes. 



