252 EXAMINATION OF SALT OF BITUMEN! 



Alcohol by di- Upon 480 grains of the fait reduced to a fine powder, 3ozs, 

 geftion diflblved f highly rectified alcohol were poured ; the mixture was fre- 

 quently agitated in a flopped- vial, during the courle of one 

 week, and the alcohol afterwards Separated by filtration j the 

 fait which remained on the filtre was treated in a fimilar man- 

 ner, with frefh quantities of alcohol repeatedly. The different 

 portions of fpirit employed which were all colourlefs, had on 

 being mingled together a difagreeable odour and bitterilh tafte : 

 they were evaporated to drynefs. 

 which afforded On leaving the product obtained in this manner unobferved 

 after evap. and to tne a j r f of f Qme wee k s j t was f OU nd to have attracted moif- 

 deiiques. a 



white fait and ture fo as to be feparated into two diftinct faline fubftances, 

 yelLwifh liquid. na mely, a yellow i(h fluid, and a cryfialline white fait. 

 The yellow fluid To afcertain the nature of thefe faline bodies, alcohol was 



bTafcohofwas affllt ' ed u P on ifc in order to fep arate tne liquid part from the cryf- 

 diluted with tallized fait. The fluid which was taken up by the alcohol, I 



water and the m i n g| e d with a like quantity of water, heated the mixture to 

 alcohol driven . ,,. . , . , . . - . . ,. . et , 



off Carbonate of ebullition, and then dropt into it a lolution ot carbonate of toda. 



foda threw down ^ cloudinefs appeared and a precipitate was depofited, which 



' ' after being warned and dried was found to be carbonate of 



lime. The refiduary fluid from which this precipitate had 



been feparated yielded nothing but muriate of foda. 



hence the fait j learned from thefe experiments that the fait under exami- 



contains muriate ,. t . , ... c , . 



of lime- nation contained muriate or lime. 



the muriatic acid To determine the quantity of it contained in the above por- 



of wh.ch gave a t j f ^ j i^cred it neceffary to afcertain the quantity of one 

 a Drecjp w th > J £> J p J 



f/lutionoffllver, of its conftituent parts; for the compofition or this fait being 



from the weight k nown the real quantity of the compound might be thence 

 of which the „ * mt ./ . , J . „ ,. / , , , r 



quantity of mu- found. The artificial muriate of foda produced before was 



nate of lime was therefore diflblved in water, and its folution decompofed by 

 the addition of nitrate of filver : the muriate of filver produced 

 when perfectly dried, weighed 40 grains, which indicate nine 

 grains of muriatic acid, anfwering to 12 grains of muriate of 

 lime. This therefore was the true quantity of muriate of lime 

 contained in the above quantity of fait. 



The folid fait Upon the fait which had been repeatedly extracted by alco- 



X l { \ by th J*T~A hoi, diftilled water was poured in order to diflblve it. On 

 hoi was diilolved * , , , • i • n i j i r 



in water. It (halting the mixture, the whole acquired inftantly a dark olive 



gave odour of green co l our> the peculiar odour of fulphurated hidrogen gas 

 i"ogen"b!came was evolved and a black pulverulent precipitate became dif- 



green, and fufed 



afforded a black 



precipitate. 



