678 
ON THE CHEMICAL CONSTITUTION OE NAKCOTINE. 
14th. Hemipinic acid treated with reducing agents has in no case been reduced to 
opianic acid or meconin ; nor have experiments to form opianic acid by the union of 
hemipinic acid and meconin proved successful ; nor has hemipinic acid been oxidized to 
any other compound. 
15th. When hemipinic acid is heated with excess of strong hydrochloric acid, chlo- 
ride of methyl and carbonic acid are formed, and a new acid, methyl-hypogallic acid, in 
accordance with the following equation : — 
C 10 H 10 0 6 + HC1 = CH 3 Cl -f C0 2 + C 8 H s 0 4 . 
When heated with hydriodic acid, hypogallic acid is formed, together with iodide of 
methyl and carbonic acid, 
Cjo H 10 0 6 + 2HI = 2CH 3 1 + C0 2 + C 7 H 6 0 4 
(Part II. p. 661). 
16th. The observations of Anderson, that hemipinic acid is bibasic, have been con- 
firmed, and an anhydride obtained by simple desiccation (Part IV. p. 675, and Part I. 
p. 354). 
C 10 H 10 O 6 = H 2 O + C 10 H 8 O 5 . 
Methyl-hypogallic acid, is however, monobasic. 
17th. Hemipinic acid is capable of crystallizing with different amounts of water of 
crystallization, crystals with half a molecule, with a whole molecule, and with two mole- 
cules of water having been obtained (Part II. p. 662). 
18th. All the reactions of narcotine and of its products of decomposition may be satis- 
factorily accounted for by the following rational formula : — 
CH 3 j N 
(C„H 9 0 2 )» 
(c 8 H„or r 
(CH,) 2 H }° 3 - 
