28 

 Boi'ueol or Solid Borneo Camphor^Cao His O2. Iii tlie 



excavations of the stem of Diyobalanops Campliora, also occuning 

 in the crude oil of valerian. White, pellucid, easily friable, small 

 crystals, lighter than water (according to other authorities, heavier 

 than water), of the smell of camphor and pepper, and of burning 

 taste, boils at 212°, and is converted by heating with nitric acid 

 into ordinary camphor =:C2o Hie 02- 



Botany Bay Gum Resin. Exudation of the stem of various 

 si)ecies of Xanthoi-rhcea. Red-yellow, often with a gi-een-grey 

 rind, brittle, of shining fracture, of pleasant balsamic odour and 

 acerb aromatic taste, fuses easily and bui-ns with the smell of 

 storax. Contains in the main a resin, soluble in alcohol, ether, 

 alkalies, alkaline earths and oils; some volatile oil, a little benzoic 

 acid and bassorine. Yields by treating with nitric acid a lai'ge 

 quantity of piciic acid. 



Brasilin=C44 H20 O14. The dyeing substance of the Brasil- wood 

 and the Sappan-wood (from Peltophorum Linnsei, Ceesalpinia Crista 

 and C. Sappan). Cannot be obtained directly from these woods or 

 only with difficulty ; has been obtained from the crystalline deposit 

 occurring in a cask filled with extract of sappan-wood, by dissolving 

 in absolute alcohol and crystallising under exclusion of light and air. 

 Amber-yellow or brownish rhombo-hedra or klino-rhombic short 

 ]irisms, obtained in straw or gold coloured needles with 3 at. water 

 from a weak alcoholic solution, which lose the water at 90° while 

 turning brown, dissolve in water, alcohol and ether; the reddish 

 aqueous solution assumes a deep carmine colour by traces of alka- 

 lies or of alkaline earths. 



Brassic Acid=ERucic Acid. 



Breidin, Brein and Bryoidin. See Arbolabrea Resin. 



Brindonia Tallow, from the seeds of Garcinia Indica. Al- 

 most white, fuses at 44°, contains olein and stearin. 



Brucin=C46 H26 No Og+SHO. Distribution and j^repara- 

 tion — See under Strychnin. The mother-ley obtained after the 

 first crystallisation of the strychnin, containing the whole of the 

 brucin and only a little strychnin, has to be mixed with as 

 much bi-oxalate of potash as to constitute ^/so of the weight of 

 the seeds of Strychnos Nux vomica employed, and is then 

 evaporated to dryness. Grind the dry mass, treat with abso- 

 lute alcohol for two days, if possible at 0°; filter; wash out 

 with absolute alcohol ; dissolve the remainder in water ; remove from 

 the solution the last traces of alcohol ; digest with hydrate of mag- 

 nesia for some days ; filter; extract the i-emnant without previous 

 drying with alcohol of 90%, and leave to evaporate. The Brucin 

 crystallises by slow evaporation in colourless quadi-angular prisms, 

 often with a yellowish tinge and efflorescent at the air, fusible by 



