632 Foreign and Miscellaneous Intelligence. 



and camphorate of lead, after they had been previously dried under 

 the air-pump with oxide of copper ; the result was : 



CC of g a, 



0.202 27 10 23 120 



0.100 acid 27 11 22 122 



0.100 27 11 21 124 



and 0.849^ of the camphorate of lead yielded 0.260 of water. 

 A hundred parts of acid accordingly consist of 



61.4098 of carbon 

 6.8070 hydrogen 

 31.7832 oxygen ; 

 and the atomic proportion would be 



By Experiment. By Calculation. 



Carbon 8.61828 = 12 atoms = 9.1724 

 Hydrogen 0.95429 = 15 0.9360 



Oxygen 4.46143 = 4 4.0000 



14.03200 14.1084 



in which, however, the results of experiment and calculation, par- 

 ticularly with regard to the proportion of carbon and oxygen, are 

 too much at variance to be supposed correct. 



I accordingly digested another portion of the crystallised sub- 

 stance with nitric acid, until, when boiled with water, no smell of 

 camphor could be perceived in its vapours. A part of this acid was 

 boiled with a solution of acetate of lead, and the precipitate de- 

 composed by sulphuric acid ; 1.105 of the camphorate yielded 

 0.760 of the sulphate, which makes the atomic weight of camphoric 

 acid = 135.67. And 0.220 gram, of the camphorate of lead at 

 14 Cent., and 331% gave 121 CC of gas, and 0.290 gr. gave 

 0.090 of water, so that the result is : 



In Hundred Parts. By Experiment. By Calculation. 



Carbon 76.4370 = 10 atoms 56.167 56.29 



Hydrogen 9.3597 = 15 6.981 6.89 



Oxygen 50.0000 = 5 36.852 36.82 



Supposing this analysis, which was made with all possible care, to 

 be correct, camphoric acid would contain 15 atoms of hydrogen, if 

 1 volume is equal to 1 atom of hydrogen, and 7 atoms if 1 volume 

 is equal to 2 atoms : it need hardly be mentioned, how much the 

 former of the two hypotheses, in this instance at least, is preferable 

 to the latter. 



On treating camphor with nitric acid, no effervescence nor any 

 evolution of carbonic acid is observed. From a number of analyses, 

 the two following appear to me to be the nearest to truth. 



