54 Scientific Intelligence. 
Under the action of heat, this latter body loses carbon dioxide 
and yields a neutral body of the composition C,H,O,, provision 
the authors give to gentisin the rational formula | 
C 3 
C,H, OS i 
| O~ and suppose that it is formed from an isomer of pipe 
: ronal united to phloroglucin, thus: 
CoH, | OF 
OH 
C 
C,H, Oy 
On 0 = do 
wat 3 + c4tt, } Off ~H,0= sa 
CoH Seb C,H, | OH 
(tau, #2 FO2+(H2O)a=(CpHT 605). 4(C111,04),+ Cg Oe 
9. On me 
BurLErow has examined the milky juice of Cynanchum acutum, 
» : : ; 
from the amide of any acid in this way. 9G c Feies anekaunide 3 
Soe ean 
