go Mr. JefTop to Mr, Ray. 



Spirit until the Flegm be raifed by a gentle Heat 3 for 

 unlefs there be fome fuch Retinaculum, the Spirit and 

 Flegm will rife together. If it be thus prepared, 

 they think it will prove a very ftrong Diflblvent: 

 They think the b 11 way of getting this Spirit pure, 

 is by putting the Infefts into W ater, for fo you have 

 nothing but the acid Juice 3 if you diftil the Ani- 

 mals themfdves, there may perhaps fomething arife 

 from the other Parts of their Bodies of an hetero- 

 geneous Nature : But the beft of all will be to try 

 both ways, and obferve the Difference, if there be 

 any. 



As to what concerns the Prefervation of Juices i 

 They do not tie themfelves ftriftly to Spirit of Sul- 

 phur, altho' they ufe it more than any other. Other 

 acid Spirits will do the fame, and fometimes better 

 for fome particular Herbs 3 and therefore they ufe 

 them indifferently, according as they find, upon Tri- 

 al, any Convenience or Prejudice 3 and, fometimes 

 they perfume their VefTels with Smoak of Sulphur, 

 and fometimes not. 



Note, Although fome of thofe Obfervations and Experiments 

 ef the two Fifhers of Sheffield, and thofe that follow of Br. Hulfe% 

 are in the Philofophical Tranla&ions ; yet thefe Letters containing 

 fome other confiderable Obfervations befides thefe, I thought it 

 convenient to prefent the Reader with the Letters as I found them^ 

 without mangling of them. W. D. 



Br. Lifter to Mr. Ray. 



Dear Friend^ Tork, December iz. ■ — yd, 



I Am very glad Mr. Willughby is near well again^ 

 and I thank God for his Recovery, and do hear- 

 tily pray a Continuance of good Health to him. Me- 



thinks 



