1867.] 



Extractive Matters of Urine. — Part II. 



133 



not be considered as identical. If a distinct name is to be bestowed on the 

 latter, I would suggest oxurianine as the most appropriate. There are 

 indications of the presence of this substance in the earlier experiments also. 

 For instance. Analysis II. Series E gave a composition not differing very 

 "widely from that to which the later determinations conducted. 



The Analyses IX. Series A and I. Series C gave numbers corresponding 

 with the formula Cgg H^^ NO^^, which seems to indicate that the substance 

 analyzed was a mixture of oxurianine and glucose, since 



H„ N0,„=C3, H,, N0,,+4 (C,, H„ 0„). 



This supposition was confirmed by an examination of the lead compound 

 of the analysis last named, a portion of which still remained. On treating 

 some of this compound, which was of a pale cream-colour, with dilute sul- 

 phuric acid, I obtained a yellow solution which was filtered from the sul- 

 phate of lead. A portion of this solution, on being mixed with more 

 acid and heated, became darker, and deposited a quantity of brown flocK's, 

 which is an indication of the presence of urianine or of oxurianine. 

 Another portion became, on the addition of sulphate of copper and an 

 excess of caustic alkali, of a deep blue colour, and on being boiled de- 

 posited an abundance of suboxide of copper. 



The Analysis IV. Series A, which led to the formula C-^ Hgg NO^^^ like- 

 wise represents a mixture of oxurianine and glucose, 1 equivalent of each 

 having been present in this case. 



The analyses of the lead compounds prepared from the so-called ex- 

 tractive matter, insoluble in alcohol, support the view which I take of its 

 nature, viz. that it consists in most cases of a compound of the extractive 

 matter soluble in alcohol with bases, since these analyses gave for the sub- 

 stance, combined with oxide of lead, numbers corresponding with the for- 

 mula Cgy H^g NOg^, as wiU be seen on glancing over the results, which are 

 here subjoined : — 



Calculation, 



C3, .'. 228 41-99 



H,g.. 29 5-34 



N .. 14 2-5/ 



O3, . . 272_ 50-10 



543 100-00 



D. II. 



F. IV. 



a. III. 



H. IV. 





2. 



2. 



1,2, 3. 



2. 



Mean. 



41-79 



42-11 



41-60 



41-66 



41-79 



5-81 



5-51 



5-55 



5-68 



5-64 



2-57 



2-G6 



2-40 



3-88 



2-87 



49-83 



49-72 



50-45 



48-78 



49-70 



100-00 



100 00 



100-00 



100-00 



100-00 



The tendency to absorb water on the part of these substances, which I 

 have pointed out in the case of urian, shows itself here also. Seeing that 

 the body having a composition corresponding to the formula C.,y NOg^ 

 was always obtained from compounds of extractive matter with bases, it is 

 probable that its formation from the one having the formula Cgg H,^ NO.,, 

 is due to the action of bases, an action which so often leads to the ab- 

 sorption of water by orgavac bodies. 



