VOL. VI.] PHILOSOPHICAL TRA.NSACTI0If8, 57g 



We cut off pretty thick branches of birch, and, having tipped the ends, in- 

 verted them, and fastened a Umbus or ring of soft wax to the great ends, which 

 we held upwards ; making with the plane of the end a vessel of about an inch 

 deep, whereinto we poured water, which in a few minutes sunk into the pores 

 of the wood, and running quite through the length of the branch, dropped out 

 of the ends considerably fast, continuing so to do as long as we poured on water. 

 The like experiment we made by fastening such rings of wax to the lesser ends, 

 and pouring in water, which run through the wood, and dropped out of the 

 greater ends, as fast or faster. This we tried once upon a sycamore without 

 success. 



Extract of a Letter from Mr. Lister, written April 8, I67I, both in 

 relation to the further Discovery of the Motion of Juices in Ve^ 

 gctahles, and removing the Difference noted in the foregoing Letter. 



iV" 70, p. 2126. 



One or both ends of the pith of a willow pole, sealed up with hard wax, will 

 yet freely bleed by the warmth of the fire. 



March 23, was the greatest frost and snow we have had this winter in these 

 parts about York. Some twigs and branches of the very same willow tree, as 

 formerly, and likewise of many other willow trees, taken off this morning, 

 March 23, when brought within the air of the fire, would show no moisture at 

 all, no, not when heated warm, and often and long turned. 



March 24, the same willow branches, which yesterday would not bleed, and 

 were thrown upon the grass-plot all night, as well as those newly cut down by 

 the fire-side, freely showed moisture, and bled this morning upon the breaking 

 up of the frost. 



Ash poles and branches this day as well as yesterday would by the fire be no 

 more moist than when I formerly tried them. 



The same morning, March 23, a twig of maple, which had had the top cut 

 off the 7th of February last, and which then bled, this day being quite taken 

 off from the tree, and brought within the air of the fire, and held with the for- 

 merly cut-end downwards, did not run at all at the end, but held on in that 

 posture, it did run apace at the other new-cut end uppermost, so as to spring 

 and trickle down. 



Note, That this doth well agree with my experiments made the last year at 

 Nottingham, where I observed wounds of some months standing to bleed apace 

 at the breaking up of every hard frost. For first, in these parts there has been 

 no hard frost this year, not comparable to the last year. Again, those Not- 



4d 2 



