b'0 C. Hansteen on the [Jan. 



heat, and precipitated by nitric and tartaric acids ; they 

 consisted therefore of urea. 



From the vomited matter urea was procured, but in such 

 small quantity as with difficulty to be appreciated. A 

 brownish flocky precipitate was obtained from the bile, not 

 completely resembling urea. No precipitate could be de- 

 tected in the contents of the small intestines, or from the 

 faeces. 



Thus, the result of the German chemist's researches is, 

 that urea can be formed without the aid of the kidnies. 

 The French chemists, Vauquelin and Segalas, found no 

 urea in the blood of a dog 48 hours after the extirpation of 

 the kidnies, a circumstance which is probably to be ascribed 

 to the short period which elapsed between the operation 

 and the experiment. 



No urea, or sugar of milk, in healthy blood. 



Ten pounds of fresh blood from the cow, evaporated to 

 dryness in the water bath, were digested with hot water, 

 and again evaporated. The residue was taken up by water, 

 and precipitated by acetate of lead. The filtered liquid was 

 precipitated by carbonate of ammonia, and evaporated to 

 dryness, and the residue digested with absolute spirits. 

 The latter process was repeated, when by evaporation, a 

 combination of soda, with a fatty acid, remained. 



In the solution of the residue, nitric and oxalic acid oc- 

 casioned no precipitate of urea, but they separated the fat 

 acid (acid of oil?). It should be observed that, by this 

 process, they had previously ascertained jfg of urea, and ~> 

 sugar of milk to be appreciable. It appears, therefore, 

 that cow's blood contains neither urea nor sugar of milk, 

 or at least, in extremely minute quantity. 



Article XI. 



On the Magnetic Intensity of the Earth. By C. Hansteen. 

 (Poggendorff's Ann. xxviii.) 



The interesting-phenomena of the declination and inclina- 

 tion of the needle, lead us to the conclusion that in the 

 southern as well as in the northern hemisphere, there are 



