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expoled to a moill atinofpliere, w hen it aftenvards dried, I have heard 

 women complain of its having loit its bri«^ht colour. Upon examin- 

 ing into the realbn of this, I found, that the furface liad been in part 

 diU'olvcd bv the moift air, and when, in drying by the fire, it again 

 became hard, an incredible multitude of I'mall particles, very many 

 of which agreed in Ihape with the larger parts, had collefted uj)on 

 the furface, and this colleflion of minute particles, clouded the bright- 

 nefs of the fugar-candy. 



But, to return to the falts in Mops ; how will tholb philofophcrs get 

 over the diHiculty, who obllinately contend, that bitternefs is caufed 

 by a fort of minute hooks in the falts, which by their pun(5lures pro- 

 duce that tafle we call bitternefs ? 



I have often laid a fingle leaf of the Hop, fuch as I have defcribed 

 it. upon my tongue, and held it there the I'pace of half a minute ; for 

 I was defirous to try the experiment, whether fuch a fingle leaf, 

 which is frequently covered with the yellow globules I have defcribed, 

 could excite a fenle of bitternefs. And, it is not without wonder, I 

 declare, that fuch a fingle leaf, upon being ftrongly comprelled be- 

 tween the tongue and the palate, I'pread all over my tongue a very 

 bitter tafie, and indeed, much ftronger than I expe(^l:ed. 



Not content with thefe obfervations, I placed a ])arccl of thefe oily 

 globule.s, fome of them pounded or bruifed, fome of them entire, in 

 two feparate glafTes, and, w itli all tlie attention I was able, I examined 

 them by the microfcope, but I did not find any particular kind of 

 particles in them. 



I then placed the glafles in my cabinet, and, that no kind of filth 

 or dirt miglit become mixed with the oil, I covered them with paper. 

 After twenty-four hours had elapfed, I examined them very atten- 

 tively, and, in fome few places, I perceived fome of thofe oblong par- 

 ticles I have before mentioned, which were very fmall and thin, and 

 after twenty-four hours longer timC; a much larger portion of ftich 



