GUMS, RESINS, AND OTHER VEGETABLE EXUDATIONS. 181 



which have been continued and valuably improved by my late 

 assistant, Mr. H. G. Smith. 



"Dr. A. T. Thomson describes four different kinds of kino, 

 under the names of African, Botany Bay, Jamaica and East 

 Indian or Amboya kino. To the second of these the Botany Bay 

 kino, which is the product of the Eucalyptus resinifera, 1 or iron- 

 bark tree, he ascribes the property of forming a tincture which 

 gelatinises on keeping." 



"Dr. Pereira also in alluding to this property in tincture of 

 kino, says "where this occurred, probably the Botany Bay kino 

 (inspissated juice of the Eucalyptus resinifera) had been employed." 

 Pereira further states with regard to this species of kino, "that 

 when digested in cold water, it swells, becomes soft and gelatinous 

 (like red-currant jelly), and yields a red liquid which reddens 

 litmus, and yields precipitates with lime water, gelatine, acetate 

 of lead, sesquichloride of iron, and, if caustic potash or ammonia 

 be previously added, with the chloride of calcium. Alcohol and 

 emetic tartar occasion no precipitate. Digested in rectified spirit, 

 Botany Bay kino becomes gelatinous as with water, and yields a 

 similar red solution, from which water precipitates nothing, but 

 which reddens litmus, and deposits a copious precipitate when 

 potash, ammonia or lime-water is dropped in. From these and 

 other experiments (says Pereira), I infer that Botany Bay kino 

 consists principally of pectin and tannic acid." (Redwood in 

 Pharm. Journ., i. 399). 



The following abbreviated remarks on some qualitative experi- 

 ments with some Eucalyptus kinos are to be found in the Report 

 on indigenous vegetable products, Victorian Intercolonial Exhibition, 

 1861 : — "The aqueous solutions of the Eucalyptine gum-resins all 

 give an acid reaction with test paper; but the differences in the 

 behaviour of each, when dissolved by water, subjected to the 

 several reagents, become very manifest. The precipitate caused 

 by a solution of gelatine indicative of tannic acid does not appear 



1 A very old error in nomenclature as shown. 



