658 PHILOSOPHICAL TRANSACTIONS. [aNNO I67I. 



jsycamores never bled, either in November, December, January, February, or 

 March, (which yet they did above 40 several times, that is, totally ceasing and 

 then beginning anew,) unless there preceded a sensible and visible frost; for I 

 had no other way of recording the temper of the air. 2. That the frost did not 

 always set a bleeding the wounds, which were made before it came, though 

 sometimes it did; but upon its breaking up, or very much relaxing the wounds 

 either made in that instant of time, or many months before, never failed to 

 bleed more or less. 3. That particularly on the breaking up of the two great and 

 long frosts (the first of which happened on the 3d of January, the second about 

 the 12th, 13th and 14th of February,) all the wounds ran most plentifully: so 

 that such times may be considered as the most proper season forgathering great 

 quantities of juice from this tree. Removing into Craven the latter end of 

 March, and thence to London, my journal was discontinued; I had yet, upon 

 my return from London to Craven, some leisure to prosecute it. Those which 

 I wounded the latter end of May did not bleed, either in the remaining part of 

 that month, or the following months, June, July, but had the orifice of the 

 wounds, made with a small augur, quite grown up, so as scarcely to admit a 

 pigeon's feather. Wherefore on the 30th of July I cut out a square piece of about 

 two inches of the bark of a large and well grown sycamore, about my height in 

 the body of it : This wound began to run the next morning about nine o'clock, 

 so as to drop, and that was all, and dried up by eleven in the morning. I made 

 a similar cut in a young sycamore on the 8th of August; which bled the next 

 morning, but stopped before nine o'clock. It did so for two or three days, but 

 then totally drying. Afterwards removing to York the first of November, I 

 here pierced, and otherwise wounded, two sycamores : but I have not perceived 

 that they have stirred to this day. Since Mr. Ray has assured me, that those 

 of Warwickshire bled the l6th of November last past copiously; and since the 

 walnut-tree also. 



Extract of another Letter from Mr. Ray, of Feb. 8, I67O-I, cou" 

 taming some Experiments about the Bleeding of the Sycamore, and 

 other Trees; as also, a considerable Note of Pliny about the Mul~ 

 berry Tree. N" 68, p. 2069. 



Concerning the bleeding of the sycamore, let me acquaint you with the fol- 

 lowing experiment. The first instant it froze, the wind at north ; the frost 

 and wind continued (some little snow and rain falling) the 2d, 3d, 4th, 5th, 

 6th, until the 7th in the morning, when the wind came about to the south- 

 east, and the weather broke up fast. The sycamores bled not all this while. 



