198 ON SOME N.S.W. TAN-SUBSTANCES. 



■60 per cent., but as E. maculata is an abundant and easily diagnosed 

 Eucalypt, and the kino is very characteristic, there is no reason to 

 suppose that there is any mistake in the nomenclature, and the 

 •discrepancy (making allowance for the great impurity of Mr. 

 Grimwade's specimens), can only be owing to the different ages, 

 and consequent weather exposures of the kinos operated upon. 

 This affords another instance of the incomparability of different 

 analyses of kino with the particulars as to age etc. omitted. 



It dissolves in rectified spirit at 6CT F. to the extent of 88*56 

 per cent. (Cf Mr. Grimwade's figures supra). 



Action of Water at 100° C. — As soon as the water added to the 

 kino is warmed, turbidity commences, the suspended matter being 

 in considerable quantity, and of a yellow-ochre to brown colour. 

 It yields an orange-brown nitrate which, as it cools, deposits a 

 sediment of a yellow-ochrey colour, that is to say, of about the 

 same colour as that of the originally suspended matter. This 

 second sediment is redissolved as the solution is again heated. 

 The odour of the aqueous solution of this kino (naturally more 

 evident in the case of the hot water), is very marked, and, as far 

 as I know, quite characteristic amongst Eucalyptus kinos. 

 Nevertheless it is so peculiar as to be difficult of description, and 

 half a dozen people would probably liken it to half a dozen different 

 things. I am inclined to liken it to decomposing apples or perhaps 

 pears, while another description which may appeal to some is the 

 smell of a not perfectly fresh wine- cask. Mr. Grim wade likens 

 this aromatic odour to styrol, and Dr. Wiesner pronounces it 

 " vinous," in the following passage* : — " E. citriodora, Hook. 

 * * * * Smells like Bordeaux wine, yellow colour, turbid on 

 cooling. Porous lumps with greenish lustre, like Socrotine aloes, 

 mixed with bark. E. maculata, Hook., exactly like the last." 



E. citriodora is now only considered a variety of E. maculata. 

 Dr. Wiesners description should be compared with mine (supra). 

 I will add that my sample is cerbainiy unlike Socrotine aloes of 

 good quality, but is very like specimens of Natal a\oes( Aloe cape// sis 

 var. hepatica). Oolour of moist residue dark dirty brown. It is 

 principally composed of woody fibre in a fine state of division with 

 a few small pieces of wood or chips. 



Action of Water at 00° F. — The colour of the solution at first is 

 bright yellow, like picric acid, hut gets browner as the process of 

 solution goes on, — a rich dark sherry-coloured liquid being 

 eventually formed. The liquid remains perfectly clear. The moist 

 residue agglomerates into flattened pieces of a roundish shape, and 

 is very much like Mosaic gold in appearance, 



* Zeitschr. d. allg. Oest. Apotheker-Vereines, quoted in " Pharmaceutical 

 -Journal," [3] ii., 102. 



