a 
the eolorles alkaline liquor is neutralized with acetic acid till an 
| on, and then alcohol be added, the liquid becomes. 
reac 
milky and clears again very soon, because ‘the potash combina- 
tion of the new formed acid separates itself at the bottom of thé 
vessel as a concentrated, clear, oily liquid. All attempts to , 
the potash salt in a crystalline form failed ; mixed with water, ! 
gives an abundant white precipitate with nitrate of silver, 
black on boiling. To estimate the combination of this new 
acid, to which may be given the name hydallantoinic acid, I 
used a lead salt. Allantoin was solved in cold oi pot- 
ash ley; after two days standing neutralized with a tic iC 
a an acid reaction, there was then added to it a soll 1 of 
ate of lead; the liquid remained at first clear ; ry Soo! 
te wa walls “a he bteay wer 
owder asily soluble in acetic acid, even on boiling with it. 
lead salt dried at 100° C. was analyzed: 
= 03745 grm. substance gave 0: 199 grm. sulphate of lead & 
0: oe grm. oxyd of lead; atomic weight = 286. 
. 0286 grm. substance. ‘gave 0-153 grm. PbO, SO, = 0: 1126 
py PbO ; atomic weight = 284. 
es 449 grm. substance gave by combustion with soda-lime 
5 erm. Plat. chl. ammon. = 0:0855 2 grm. nitrogen 
4. 0:52’ 5 grm.- ge a= gave, burnt ey h OMe of copper; # 
cid and 0-138 grm. wat | 
toittae of lead may 
as the comparison of fc 
2 a Found. ey sei 
Lequiv. PbO 112. 38-79 39:09. 39:37) 
be Cn cee AB it SD 16-709 se 
OW Bey ee ee 
8 «" 0,9), yhageNee: . Oak taal 
he 
This new acid thus reealten fom allantoin by ben up two 
equivalents of watér. : 
“ equiv. of — =C, NAS, . 
~ © wate = % H, 0, 
waite of ee acid =, N, BG. 
! z with sulphuretted hydrogen, this acid gould be re- 
from the lead salt as a colorless solution of a very acid 
