

338 Prof. E. N. Horsford on Glycocoll, 



as a member of hippuric acid, as it escaped oxydation with the 

 potash and sulphuric acid. 



2. Fumaric acid is present in a great variety of plants.* In 

 asparaginef we have the elements of fumaric acid and ammonia, 



which with the requisite metamorphosis would become gly- 

 cocoll. 



2(NH 3 , G 4 H0 3 )=C e H 8 N 2 6 =2(C 4 H 4 N0 3 ). 



3. SchlieperJ by treating isinglass with chromic acid, obtained 

 among a variety of products benzoic acid. 



It is found frequently in the vegetable kingdom, for example 

 in gum-benzoin. 



We have then benzoic acid and glycocoll (asparagine) in the 

 vegetable kingdom, in the tissues of the animal body, and in the 

 form of hippuric acid in the urine. 



., It remains to be ascertained if they be present in the animal 

 and vegetable albumen, jibrine, and caseine. 



Formation of Uric Acid Concretions. 



Keller observed both urea and uric acid in the urine after the 

 separation of hippuric acid, and therefrom concludes that Ure's 

 suggestion that benzoic acid might be employed to prevent the 

 formation of uric acid concretions, is too hasty. 



The following experiment may have iu connection with this 

 subject sufficient interest to justify its being recorded. 



The morning urine from mixed animal and vegetable diet, was 

 evaporated over a water bath to thick syrup consistence, and 

 tested for glycocoll. Neither in the alcoholic extract, nor in the 

 residue, could a trace be recognized with the oxyd of copper test. 

 Nitric acid gave a precipitate of urea, not, however, in large 

 quantity. 



At ten o'clock the next evening, four grammes of glycocoll 

 were dissolved and taken in water. No consciousness oi having 

 taken any thing unusual was felt. The next morning urine re- 

 acted acid. Its color was the same as that of the previous day. 

 Upon evaporation to syrup consistence, it presented a much larger 

 quantity than before. ~ ' J ~^ * nn " 



turated 



centrated oxalic acid, accurately neutralized with carbonate oi 

 soda and extracted with spirits of wine. Another portion was 

 supersaturated with acetate of lead and treated with h y dr0 ' s "|" 

 phuric acid. Upon evaporating to syrup the extract of the nrs , 

 and the filtrate of the second, and testing both with the oxyd ° 



Conner, rrn rrnr>p nf crhr™™!! nm „ J,„„,.„„,.„,1 Th* alvCOCOll 1W 



copper 



The glyco 



* If we inrlude maJic acid, the number will be greatly increased- . . 



Buc iner's Report, Bd. xxxiv, s. 368. Liebigs Ann., Bd. xxxi, »• ~ 41 ' 

 xxxvu,, s . 257; Bd. li,s. 246. 



Bd- 



tGeiger'sMag.. x XXV ,42. 



1 Liebig s Annalen, Bd. Jviii, s. 1. 



