J3S ARTIFICIAL CAMPHOR. 



gas ; it acquired a deep yellow, retained its tranfparence. 

 No camphor. became a little more continent, but did not produce any 



camphor. 



A«Sion of ful- Concentrated fulphuric acid afting too violently on oil of 



phuncacid. turpentine, the decompofition of which it fpeedily effects, we 



made a mixture of equal weights of this oil and fulphuric 



acid marking only 40° of the areometer. The aftion was 



confined to the point of contact, and was analogous to that of 



liquid muriatic acid. 



SW diftillation Eight ounces of oil of turpentine were kept for three days 



o^oi o turpen- j n a gj a f s a ] em bic, placed on a fand-bath, the temperature of 



which was maintained at about forty degrees of Reaumur's 



fcale. This time being elapfed, we found in the recipient 



nearly four ounces of a very white and very light volatile oil, 



and in the capital many fmall cryflallizations of true camphor. 



The oil remaining in the cucurbit was of an amber colour, and 



very much thickened. 



A-aionof bu- To fatisfy ourfelves whether the other volatile oils would 



riaricacid gas on f ., . . .. -.. -. ■.. . ,• 



tfce other vola- rurni " 1 camphor by the action of the muriatic gas, we mcor- 

 til; oils. porated them with it in different proportions ; but did not ob- 



tain any precipitation. They became very black, and con- 

 tained a great quantity of heavy oil, &c. 



CONCLUSION. 



Genwal rcfuks. iff. That the production of camphor, announced by M. 

 Kind, is uniform in the proportions he indicates, and of what- 

 ever foil the oil of turpentine may be. 



2nd. That the camphoric product may be efiimated at about 

 half the quantity of the oil employed. 



3rd. That a greater quantity of the gas does not add to the 

 product, nor does it deftroy it. 



4th. That this camphor may be purified by water, by alka- 

 line folutions, charcoal afhes, quick-lime and alumine : and, 

 that thefe three laft fubfiances are more efpecially prefer- 

 able. 



5th. That it differs from what is extracted from the camphor- 

 laurel, in its tafie, which is not fo bitter, and in its odour, 

 which is lefs penetrating ; and, that it prefents an abfolute 

 difference in its mode of acfion with the nitric and acetic 

 acids, the firfl of which only diffolves it by a reciprocal de- 

 coropofition. 



6th. 



