W. Gibbs on Uric Acid. 297 
N=€—Ho N=€—Ho 
€)—-H Mycomelic acid. 
To explain all the transformations of the members of the 
uric acid series would require an inordinate extension of this 
ee aT) 
: 
of 
°o 
B 
co 
° 
Eh 
j=] 
Qu 
© 
a 
© 
Qu 
a 
fae) 
4 
ao 
& 
5 
2 
c. 
° 
=] 
_ 
3 
et 
= a 
a 
ef 
= 
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m 
4 
E 
== 2 
€,H,N,0,+H, = €,N,H,0; 
Alloxan, Dialurie acid. 
2€ H,N,0,+H, — €,H,N,0,+H,0 
Aloxaa. xantin. 
€,H,N,0,+€,N,H,0, = ©,H,N,0,+H29 
Alloxan. Dialuric acid. Alloxantin. 
€,H,N,0,+H,6 = €,H,N,0, 
Alloxan, loxanic acid. 
€,H,N,0,4+0 = €,H,N,0,+€92 
Alloxan. Parabanie acid. 
One transformation deserves especial notice from its bearing 
_ “pon the theory. By the action of cyanic acid upon dialur- 
5 am yer obtained pseudo-uric acid, the equation expressing 
reaction being 
in regard to the mo- 
f the uric acid series appear to me to afford 
attracted the attention of chemists. The first to which I 
tive by the addition, subtraction or replacement of 
radicals such as hydrogen, hydroxyl, &., and by the 
