GRUENBERS AND Giles: NOTES ON “ BASTARD’’ LOGWOOD 369 
ELEMENTARY COMPOSITION OF HEART-WooD, — Elementary 
analysis of typical samples of (1) 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 
EIGHT AT 110°C.* 
| L. | Il. III. 
oe ae “Red” Logwood. paras | “* Bastard” (medium was | 1) “ Bastard ” ’ (poorest quality). 
| Ct | HY] ast. of ) mw | am | oe | H | Ash. 
2 51.91 | 5.98 | 1.80 || pe ai a ee ee | 51.04 | 5.67 | 2.03 
- 2. | .52.00 5-80 | 2.06 || §1.77 | 6.03 | 1.68 || 51.35 5-74 — 
a+ S222" | 5.76 | b.78 51.45 | 6.03 | — | 51.00 | 5.58 | 
Av. | 52. 5-84 | 1.86 || 51.56 | 5.96 | 1.63 || 51-13 | 5.66 | ary 
SUMMARY OF AVERAGES 
| is | II. HI. | General Average. 
see | | | 
Carbon 52.01 51.56 51.13 51.57 
Hydrogen, | 5.84 5.96 | 6 ‘82 
1.86 . 1.63 | 1.94 1.81 
as eee | 42.15 | 42.48 3.21 42.61 
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,,H,,O,. 
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 110° C-. (first series) and that, therefore, the 
Previous results were not influenced by that procedure. 
GENERAL COMPOSITION OF SEEDLINGS. —In TABLE III we pre- 
nent the results of some analyses of seedlings of “red” logwood 
Lt Daly heart-wood was employed in this work. This was converted into sawdust 
and aoe such portions as passed through a very fine sieve were taken for analysis. 
methods of analysis were those which are now in general use. 
a, figures for sont nd hydrogen are calculated (from the data of direct 
analysis), for ash-free 
ft Calculated, by hoa for ash-free — 
