Gruenbekg am) Gies: Notes on " bastard" logwood 371 



Conclusions from the general analytic data. — All of the 

 preceding analytic results make it evident that the chemical differ- 

 ences existing among these logwoods are quantitatively very slight. 

 They also make it appear probable that the variations in the dif- 

 ferent samples of the wood are chiefly variations in the chemical 



Figure i. Seedlings of logwood, one year old. a, "red logwood." b, 

 " bastard logwood." Both grown from seeds obtained from " Old Hope " plantation, 

 Jamaica. 



characteristics of the pigments themselves, which, as is well known, 

 possess as a rule high tinctorial qualities even when they occur in 

 only very small amounts. Our results in this connection would 

 also indicate that there are no striking structural differences among 

 these varieties of logwood. They suggest, likewise, that even 



