342 ODOROGRAPHIA. 
readily soluble in alcoho]; 100 parts of water dissolve 0°625 at 
12° and 10 parts at the boiling-point. It crystallizes in small 
plates melting at 178°. 
Camphorophone, C,H,,0O, is formed when camphor is heated to 
100° with sulphuric acid *, It is an aromatic liquid, boiling at 
about 210°, and is considered identical with Jsophrone—obtained, 
together with other products, by the dry distillation of cane- or 
grape-sugar with lime+. The Phorone which is formed by heating 
acetone with lime or sodium also appears to be camphorophone ¢. 
Bornyl acetate is formed when Borneol is heated to 150° with 
acetic anhydride. It is a thick pleasant-smelling liquid which 
boils at 227° and crystallizes on standing for some time in masses 
which melt at 24°. 
Bornyl formate and Bornyl valerate have been prepared, and 
according to Haller § the borneol separated from these ethers is 
identical with Ngai camphor. 
Borneo camphor (Borneol, or Bornyl] alcohol) can be artificially 
prepared by heating an alcoholic solution of ordinary camphor with 
sodium ||, the following method being employed :—“ Fifty grammes 
of ordinary camphor are dissolved in 500 cb. ems. of alcohol of 
96 per cent. in a capacious flask, fitted with a wide reversed con- 
denser, through which 60 grms. of sodium are gradually added in 
small pieces. The operation must last about an hour and the rise 
of temperature not be prevented by cooling; it is even advisable 
to accelerate the completion of the reaction by finally adding about 
50 grms. of water, the mixture being well agitated during this 
process. The product js then poured into 3 or 4 litres of cold 
water, the separated borneol collected on a filter cloth, well washed, 
and crystallized from petroleum ether after drying 4. 
According to Berthelot **, Borneo camphor can be prepared 
artificially by heating common camphor with alcoholic potash ; its 
formation being attended either with evolution of oxygen or with 
simultaneous production of camphic acid. ‘The action takes place 
* Jahresb. Chem., 1857, p. 483; Ann. Chem. Pharm. exxiii. p. 298. 
+ Ann. Chem. Pharm. xv. p. 278, and ibid. c. p. 353 & elxii. p. 303. 
{ Ibid. cx. p. 32; exii. p. 309; & exi. p. 279. 
§ Compt. Rend. ciii. p. 151. 
\| Ber. Deutsch. chem. Ges. xvi. p. 2930 ; ibid. xviii. Ref. p. 335; ibid. xvii. 
p. L036 
] Wallach, Ann, Chem. Pharm. ccexxx. p. 225, 
** Ann. Ch. Phys. (3) lvi. p. 78. 
