260 
ON PAPAVERINE. 
cation of heat, and separate again on the cooling of the 
solutions. It is insoluble in water. The solutions of pa- 
paverine turn slightly-reddened litmus-paper blue. When 
moistened with concentrated sulphuric acid, it acquires a 
dark blue color, by which it is easily recognized. 
The papaverine used for analysis was prepared from the 
pure muriate, which had crystallized from the aqueous 
solution, by dissolving it in hot water, precipitating with 
ammonia, and crystallizing the precipitate from alcohol. 
The analysis furnished — 
Carbon - - 70.68 70.47 70.62 
Hydrogen - - 6.65 6.32 6.65 
Nitrogen - - 4.75 
These numbers, with the assistance of those obtained in 
the analysis of the platinum double salt, lead to the follow- 
ing formula for papaverine : — 
Mean of Experiments. 
Carbon 
70.59 
40 
= 240 
70.79 
Hydrogen - 
6.50 
21 
21 
6.20 
Nitrogen 
4.75 
1 
14 
4.13 
Oxygen 
8 
64 
1S.S8 
Chem. Gaz. March 15, 1850. 
ART. LXI. — ON THE RESIN OF THE NORWAY SPRUCE FIR. 
(ABIES EXCELSA.) 
By Mr. Daniel Hanbury, Jun. 
In the Materia Medica of the London Pharmacopoeia, 
two forms of the resin of the Norway Spruce Fir {Mies 
excelsa) are enumerated: one Mietis resina, called Com- 
mon Thus or Frankincense ; the other, Pix Jibietina or 
Burgundy pitch. The latter is stated to be the resin in a 
prepared state (Resina prseparata,) the preparation essen- 
tially consisting in the removal of the impurities by straining. 
