238 Intelligence and Miscellaneous Articles. 



And it was afterwards found that the similarity of composition 

 existed with respect to the blood of these animals. On analysing 

 the arterial and venous blood of the rabbit, the results obtained were, 

 Arterial Blood. Venous Blood. 



Carbon 502 55 7 



Azote 163 16-2 



Hydrogen 6*6 6 4 



Oxygen 26-3 207 



99-4. 99-0 



The annexed were the results of a comparative analysis of the ex- 

 crement of the 



Dog. Horse. 



Carbon 41-9 386 



Oxygen 28' 29- 



Hydrogen 5*9 6*6 



Azote 4-2 0-8 



Earthy matter. ... 20- 25- 



100-0 100-0 



The authors observe, that the excrement of the dog contains much 

 azote, while the small quantity contained in that of the horse may be 

 attributed to an admixture of animal fluids, as the bile, mucus, &c. 



MM. Macaire and Marcet have arrived at the following as the 

 results of their experiments: 



1st, That the elementary chemical composition, and especially 

 with respect to the azote, is similar in the chyle of herbivorous 

 and carnivorous mammifera. 



2nd, That arterial blood contains as much azote, but less carbon 

 than venous blood. 



3rd, That the elementary chemical composition of the blood of 

 graminivorous and carnivorous animals is identical, and the sub- 

 stances which they contain have also the same composition. 



4th, That when equal weights of the two fluids have been per- 

 fectly dried, the blood of a mammiferous animal, whatever may have 

 been the mode of its nourishment, contains more azote than its 

 chyle. 



5th, That the excrement of carnivorous animals contains more 

 azote than that of herbivorous animals. 



6th, That neither carnivorous nor herbivorous animals can exist 

 upon food entirely free from azote. 



7th, and lastly, That unless it be allowed that azote may be 

 formed by the process of vitality, it must be admitted that what the 

 chyle contains is supplied from the food, and that in the two classes 

 of mammifera examined, respiration supplies the complement of 

 that which is found in the blood. — Ann. de Chim., torn. li. p. 371. 



ACTION OF HEAT ON IODIDE OF AMID1NE. 

 M. Lassaigne remarks, that in making some experiments on the 

 combination of amidine with iodine, which is easily obtained by 



