8 ALSTONIA BARK. 



B.P. : Dose, -2 ounces. Tincture B.P. : Dose, -2 

 drachms. Aloin B.P. : Dose, -2 grains. Tincture 

 Aloes and Myrrh U.S. P. : Dose, 30 drops. 



Distinctive character Socotrine is the mildest in 

 action and the most expensive, but varies much in 

 quality. The powder touched with nitric acid does not 

 give a crimson colour. 



Barbadoes Aloes has a disagreeable odour and is 

 opaque. Two grains of it are equal to three of Socotrine 

 in purgative action. 



Cape Aloes is translucent asd has a red-currant 

 odour. 



Good Aloes should yield 40 per cent, of soluble matter 

 to cold water. Both Barbadoes and Cape Aloes in 

 powder give a crimson colour with nitric acid. 



ALSTONIA BARK. Alstonia constricts, F. Muell. 



N.O. Apocynacece. 



Syn. Fever Bark, Australian Quinine, Australian 

 Febrifuge. 



Action Anti-periodic, febrifuge, tonic. An Austra- 

 lian remedy for all kinds of fevers. Also efficacious in 

 certain forms of rheumatism. 



Preparations Powdered bark: Dose, 2-8 grains. 

 Fluid extract : Dose, 4-40 drops. 



Distinctive character Bark in large quilled pieces, 

 iJ-2 inches wide and \ inch thick, brown and corky 

 externally, fissured deeply lengthwise and transversely, 

 the inner surface yellowish brown and coarsely striated. 

 In transverse section, a corky layer showing alternate 

 lighter and darker bands, and an inner fibrous yellow 

 layer in which shining particles can be seen with a lens. 

 Taste, bitter. The yellow infusion has a blue fluor- 

 escence. 



