406 Foreign and Miscellaneous Intelligence. 



Carbon Has always been estimated in the state of carbonic acid ; 

 and when heat has been applied and the oxide of copper has done 

 its duty, pure oxygen has been passed through the tube to burn what 

 carbon might remain in contact with the reduced copper : this pre- 

 caution appears very necessary ; 100 of carbonic acid was considered 

 as containing 27.6508 of carbon. 



Hydrogen Was occasionally obtained in the gaseous state, by 

 bringing the water produced in the analysis in contact with the alloy 

 of antimony and potassa, first cold, and then heated ; but as upon 

 various trials the process of estimating its quantity from the weight of 

 water produced was found to be exact, it was generally adopted. 



Azote. This principle was obtained in the gaseous state by passing 

 the nitrous oxides and acid over heated sulphuret of barium (sulphate 

 of baryta heated with charcoal) ; the oxygen was taken away and the 

 nitrogen sent forward into the receiver"; but that no hyponitrite of 

 baryta might be formed from nitrous acid, some pieces of metallic 

 copper were interposed between the oxide of copper and the sulphuret 

 of barium : this would convert any nitrous acid into nitric oxide, and 

 prevent the source of error referred to. 



The following are the proportions of the elements contained in 

 many substances, each being in a very pure and dry state. 



Carbon. Hydrogen. Oxygen. Nitrogen. 



1 Mannite 0.38770 0.08487 0.52743 



2 Cantharidine 0.68560 0.08432 0.13152 0.09856 



3 Piperine 0.76100 0.10274 0.13626 



4 Caryophylline 0.81920 0.12250 0.05730 



5 Aurade 0.83760 0.150892 0.011508 



6 Amynine 0.81040000.10473680.0848632 



7 Ceroxyline .. 0.83200 0.11050 0.05750 

 .8 Arbreabrai. . 0.797280 0.106512 0.096208 



9 Alouchi 0.82640000.11006240.0635376 



10 ("sCopalmi balsam 0.8925 0.1046 0.0029 



IK Bitter almonds 0.744000 0.0683452 0.1179268 0.059728 



12 (I Black mustard 0.532800 0.111840 0.094416 0.149152* 



13 Morphia 0.705200 0.079884 0.167056 0.047860 



14 Quinia 0.745520 0.084322 0.087212 0.082946 



15 Cinchonia 0.788800 0.088760 0.028918 0.093522 



16 Strychnia 0.764000 0.078784 0.082190 0.075036 



17 Brucia 0.704800 0.078108 0.149154 0.067938 



Aurade (5) was discovered in the volatile oil of orange flames by 

 one of the authors. 6, 7, 8, and 9 are subresins discovered by M. 

 Bonastre, and described in the Journals some time since. M. Bo- 

 nastre supplied those which were analysed. There is reason to fear, 

 from the oxygen in the volatile oil of bitter almonds, that the air 

 had acted on it, although great care was taken to prevent the contact. 



* Sulphur 0.1 11 792. 



