Gruenberg and Gies: Notes on "bastard" logwood 3G9 



Elementary composition of heart-wood. — Elementary 

 analysis of typical samples of (i) the red logwood of commerce, 

 (2) a "bastard" variety somewhat resembling it and (3) a second 

 specimen of the "bastard" type yielding hardly any pigment to 

 water gave the following results : 



Table I. 



Percentage elementary composition of substance dried to constant 



weight at iio°c* 



The most significant feature of these results is the decreasing 

 amount of carbon in the " bastard " wood. The differences are 

 too slight to warrant any emphasis, but are such as might be due 

 to a lower percentage of hematoxylin, which is a pigment of high 

 carbon (and low oxygen) content- — C lfi H 14 6 . 



The data of the second series of analyses, given in table II, 

 show that the wood was not decomposed in the process of drying 

 to constant weight at no C. (first series) and that, therefore, the 

 previous results were not influenced by that procedure. 



General composition of seedlings. — In table III we pre- 

 sent the results of some analyses of seedlings of " red " logwood 



*Only heart-wood was employed in this work. This was converted into sawdust 

 and only such portions as passed through a very fine sieve were taken for analysis. 

 The methods of analysis were those which are now in general use. 



fThe figures for carbon and hydrogen are calculated (from the data of direct 

 analysis), for ask-free substance. 



\ Calculated, by difference, for ash-free substance. 



