( 20(> ) 



Iierb or blade of grafs appearing between them. And the juice, tliiis 

 expelled from the branches/was infpiflated or thickened on their fur- 

 faces into globules. 



Upon examining tlie globules on the Hops by the microfcope, I 

 found, that the part which might be called their coat or ihell, was not 

 fmooth, but rough, and in wrinkles, occafioned, as I concluded, by 

 this, that the juice which iffued from the plant, and formed itfelf into 

 globules, liad, in part evaporated, whereby the outer furface or fkin 

 of thofe globules, contracted into wrinkles. 



Thefe yellow globules, when broken, and put into a clean glafs, I 

 fuffered to fland in tlie glafs for fome days, and theii applied myfeU" 

 to examine the oil. I found that great part of tli'.s oil, had collected 

 jtl'elf into thin oblong particles, and, in fuch numbers, that I could not 

 but filently wonder at the figlit. Where this oily iubllance lay mucii 

 difperfed, there, the oblong particles I have mentioned, did not ex- 

 ceed in length the diameter of a very fine thread of wool, but, where 

 the oil was collected in larger quantities, they were four times that 

 fize. In fome places, I obferved oblong particles, with twelve points, 

 ilTuing, as it were, from a center, with one of their ends terminating 

 in a point, the others, blunt or obtufe. 



- Now, we may lay it down for a certain truth, tliat thofe pellucid 

 nnd oblong particles, which I have mentioned to be intermixed with 

 the oil, although, by their minutenefs, they efcape our fight, are 

 really a fpecies of falts, and that the bitternefs which Hops impart to 

 beer, is produced by thofe I'alts. And we may alfo be allured, that 

 thefe minute falts, althougli they may be a thoufand times lefs than 

 what can be feen by the microfcope, do yet, agree in lliape and 

 figure, with the larger falts of the fame I'pecies compounded of them, 

 in like manner as we obferve in common fait, in nitre, or fait petre, 

 and in many other falts. The fame may be obferved, in that kind of 

 fugar call.ed fugnr-candy ; for, upon this becoming damp, on being 



Cg 3 



