l60 PHILOSOPHICAL TRANSACTIONS. [aNNO I667, 



We have found new ways of making this transfusion with so much facility, 

 that M. Emmerez undertakes to perform it without any ligature, only by punc- 

 ture, like that which is used in letting of blood. 



The re-uniting of the separated Bark of Trees. By Dr. Merret. 



N" 25, p. 453. 



In the middle of March I made a section of the rinds of ash, and of the 

 tree falsely called sycamore. The first section of each of the rinds was square, 

 whereof three sides were cut, the fourth uncut. The success was, that the 

 whole bark united by binding it with pack-thread, leaving a scar in each of the 

 cut sides. 



Then I cut off, and separated entirely from the tree, several parts of the bark, 

 some shallower, leaving part of the bark on ; others to the very wood itself, 

 both in the trunk and branches ; from an inch square to less dimensions ; and 

 some of them I bound close with pack-thread : all which were separated, a new 

 rind succeeding in their place. Some I covered over l^eyond the place of inci- 

 sion with diachylon plaster, and tied them fast with pack-thread. All which, 

 thus bound and plastered, in the space of three weeks firmly united to the tree. 



But trying the same about Michaelmas and in the winter season, at neither of 

 these times could any union be made of the bark to the tree. I suppose it was 

 because the sap mounted not so vigorously and in such plenty as in the spring 

 season. 



lb recover Cherries almost withered. By Dr. Merret. iV" 25, p. 455, 



Anno 1665, I made the following experiment with three May cherry-trees, 

 planted in a rich mould, which lay to a south wall, shaded from the sun by a 

 high building-, till the beginning of March, when being high, and shining 

 strongly on them, the fruit constantly withered for some years before. But this 

 year, the season being very hot and dry, I bared the roots of one of them by 

 making a hole abaut it, and watered it every morning and evening with about 

 a gallon of water, for about a fortnight before the cherries came to redness ; and 

 the fruit was full and good. The other two trees, left without this ordering, 

 had most of their fruit withered, having only skin and stones. Now to try this 

 experiment farther, I made a hole round about one of the other trees, and fed 

 it with water daily, as the former; in a week's time those that were quite wi- 

 thered fell off, and the rest that were not so, grew and increased exceedingly: 

 the other tree, that was not used after this manner, had not any of its fruit 

 come to perfection. 



