292 M. ChevreuVs Chemical ExainUiaiion of two [Apuil, 



18. The analogy apparent between the two residues of the 

 specimens A and B, and especially the small quantity of the 

 substance which I was possessed of, determined me to mix them. 

 1 shall relate the experiments that I made upon these residues, 

 which I shall describe as the soluble matter of the soil of the 

 cavern of Kiihloch. 



19. The soluble matter was four times treated with ten times 

 its weight of cold water. The washings were evaporated to 

 dryness, and the residue was treated with alcohol ; the alcoholic 

 solution was evaporated, and the residue treated with fresh alco- 

 hol : by these means the soluble matter was divided into alco- 

 holic extract, and residuum insoluble in alcohol, which last was 

 added to the matter undissolved by cold water in the four wash- 

 ings above mentioned. 



20. I shall now examine successively, 



Art. 1, the matter of the soil soluble in^-, . 7 , 7- 



7 •/• , ,-• • 7 J • . / ist, alcoholic extract: 



boilmsf water, aivided into \ cj -j j- 



A 4. 0*1 \t I- a 1 J- ?2a, residuum undis- 



Art. z, the matter or the soil itndis- ( 7 j • 777 



1 J • J •/• t \ solved in alcohol, 



solved in boiling water. J 



o 



Article I. — Examination of the Matter of the Soil of Kiihloch 

 dissolved in Boilins Water. 



1. Alcoholic Extract. 



21. It contained an organic principle of a red orange colour, 

 an acidulous ammoniacal salt, traces of phosphate of magnesia, 

 of chloride of potassium, and of a salt of potash, the acid of 

 which was of an organized nature. This extract was deliques- 

 cent ; by distillation it yielded a very acid product, the strong- 

 smell of which resembled that of the hydrocyanic acid ; having 

 only 0"03 gr. of alcoholic extract, I could not make any further 

 experiments. 



2. Matter insoluble in Alcohol. 



22. I subjected it to the action of cold water in the mode 

 described in my Considerations sur V Analyse Organique et sur 

 ses Applications, p. 119. The first solutions were of an orange 

 colour, and the last yellow ; from these solutions there were 

 obtained, first, some lamellar transparent crystals; secondly, 

 some smaller crystals in fine needles, and of a straw colour. 



1st. Lamellar Transparent Cn/sta/s. 



23. They were slightly coloured, but the colour was unequally 

 distributed ; there can be no doubt but that if they had been 

 perfectly pure, they would have been colourless ; they suffered 

 no alteration by means of concentrated sulphuric acid ; potash 

 disengaged much ammonia ; they precipitated sulphate of 

 barytes from the nitrate ; they very slightly reddened litmus 

 paper; the precipitate which they gave with acetate of lead 



