Analyjts of the Honey-Jlone, or Mellite> 333. 



able to determine exactly the proportion of water it re- 

 quires. 



5th. Some grammes of the fame acid diflblved in water, 

 being mixed, tft, with a foliation of lime, immediately formed 

 a white flaky precipitate, which foon depofited itfelf at the 

 bottom of the liquor : 2d, with a folution of the fulphat of 

 lime, a light granulated and cryftallifed precipitate, which 

 left to the water a little tranfparency, but which was in- 

 creafed and rendered flaky by the addition of a drop of am- 

 monia * : ^d, with a folution of the muriat of barytes, & 

 very fmall precipitate at firft, but fome moments after a mul- 

 titude of cryftals in the form of needles : 4th, with a folution 

 of fiber, a white precipitate, filky and brilliant like a folution 

 of foap ; fome time after it depofited itfelf under the form of 

 dull; : 5th, with a folution of lead by nitric acid, a white 

 pulverulent and very heavy precipitate : 6th, with a folution 

 of mercury, a white precipitate which was rendered black by 

 a drop of ammonia. 



From the refult of thefe experiments it appears the acid of 

 the mellite has a great many properties analogous to thofe of 

 the acid of forrel; and by the comparifon which I made, I 

 could perceive no other differences than the following : ift, 

 The precipitate which it occafions in the folution of ful- 

 phat cf lime manifefts itfelf lefs fpeedily, and is cryftalline, 

 inftead of being pulverulent like that formed by the acidulous 

 oxalat of potafh. ad, It feems lefs acid to the tafle than 

 the acidulous oxalat of potafh, but this may be owing to my 

 not having added to its combination with potafh enough of 

 nitric acid to deprive it of a fuflicient quantity of that alkali. 

 3d, It fwells up a little more by heat than the acidulous oxa- 

 lat of potafh. 



In a word, the fublimated fait, the large quantity of car* 



• The acidulous tartrite of potafh docs not immediately produce a pre- 

 tipitate in a folution of the fulphat of lime, but in 24 hours after there 

 are formed in the mixture cryftals witi very brilliant fnrets, which are 

 a compound of lime mid tartareous acid. Though cryftallifed, this cartrite 

 of Kme has no refemblance to that produced '>y the acid of honey-ftone 

 with the fame mattei ; ii differs from it by (welling up in the fire, where- 

 as the otlr.-r is decompofed without fwcjling up j and in this has an an- 

 bI lat of lime. 



Vol. VIII. Xx tonic 



