% i Dr. Lifter to Mr. Ray. 



ing the gliding of a Chry falls, which is a pretty Pha> 



nomenon. 



I know not what to think of the Uncertainty of 

 the Experiments we make concerning the bleeding of 

 the Sycamore. I have obferved almoft daily two 

 Trees, which I pierc'd in feveral Places the firft of 

 November $ but to this Day no Signs of the ftirring 

 of any juice^ which indeed furprizes me, we having 

 had two or three pretty hard Frofts already j yet nei- 

 ther at their coming, nor going away, made they 

 any fenfible Alteration as to this Particular. In my 

 laft Year's Journal I find, that, particularly the 17 th 

 of December i there was a very copious Bleeding 3 and 

 onwards I find this Memorandum^ that in fome great 

 Bleedings there was ftill to be obferved a mighty 

 Reeke or Steam anfing from the Ground 3 and, in- 

 deed, this kind of Thaw has not yet happened at 

 York this Year. I defire to know what Succefs you 

 have met with this Year in fuch-like Experiments. 



I am glad to hear you have fpared your Perfon, in 

 not exp* *ling your felf to I know not what Incon- 

 veniences. As for the fearching of the Alps once 

 again, it would have, no doubt$ been very beneficial 

 to the common Wealth of Learning, but that is e~ 

 nough obliged to you already. 



Dr. Hulfe to Mr. Ray. 



YOURS came fafe to my Hand. I thank you 

 for the Experiments .contained in your Letter* 

 I iud thought to have tried fome other Experiments 

 with Pilmires s but now I mull ftay till next Spring, 

 The Juice of thefe lnfe£ts will ferment with the 



Powders 



