166 EbCAL YPTUS. 



The official kino (Pterocarpus) contains, I believe, no 

 substance which is not contained in this and some allied 

 kinos, for which they appear to be a perfect substitute. 

 See Pharm. Journal [3], xx. 221, 321. 



The kino of Eucalyptus rostrata will, be found men- 

 tioned in all modern works on Materia Medica. In Mar- 

 tindale and Westcott's Extra Pharmacopoeia, for instance, 

 we have the following: "Eucalyptus rostrata and Euca- 

 lyptus corymbosa, and probably other species imported 

 from Australia. It is semi-translucent and garnet-colored, 

 not so dark as, but resembling kino in appearance, soluble 

 in water, tough, difficult to powder [not correct as applied 

 to these two kinos, J. H. M.], it adheres to the teeth when 

 chewed, is intensely astringent to the mucous membrane, 

 useful in diarrhoea, relaxed throats, and given with success 

 to check the purging of mercurial pills." 



But the following statements pertaining to the percent- 

 age of tannic acid, and the solubility, are somewhat mis- 

 leading, since I have shown the enormous variation in the 

 properties of kinos caused by age. 



"Of 100 parts 90 are dissolved in cold water, the solu- 

 tion being clear. Twenty-seven parts of isinglass precipi- 

 tate all the astringent matter." Squires' Companion to 

 the B. P. 



Dr. Weisner says of a sample: "Easily soluble in water 

 and alcohol; solution neutral, free from gum-resin. Broken 

 masses of a zircon-red, sometimes light brown, mixed with 

 bits of dark." 



47. "Red Gum;" purchased in Sydney, 22nd Novem- 

 ber, 1888. Of Victorian origin. 



In lumps up to the size of peas, though angular. Pre- 

 vailing color purplish brown. Is readily powdered between 



