GRUENBERG AND GiEs: NOTES ON “ BASTARD ” LOoGWoop 373 
XII. Chloroform — no color in some, faint yellow in others, 
XIII. Benzol — no color in any. 
TABLE IV. 
RELATIVE PIGMENTATION OF VARIOUS KINDS OF LOGWOUD. 
Extractant. Pee ee ele ee eee 
pe ed be | | j——_-|-_——— 
I, Water. | a) | [ee ae ae ee ee ee 9 
Il. 0.2% HCl tot ae ae | 6 Se eee 8 
Ill. 2.0% HCl. Tf SO Bi | a a eee a 
IV. 0.01 % KOH. I 2 4. )-9,4°8 6 7 81-9. | 10 
V. 0.15 % KOH. te i ee ee Ce eB ee ee ae a 
VI. 0.5 %'Na,CO, ae ae oe eh aa nee 
VIII. Ether. ee ee ee OR Sey eh, a i oe 
IX. Absolute wht | ee ne cali 24 O | S04 i oe ee 
. Acetone, See el ae pd ee Eee ae eee Oh, as ay ad Sap dy. 
_XI. Acetic ether. | I | ay eee eg ee eee ae 
Average. 1.2 | 2.3| 3.4] 4.6| 5.4| 6.1 | 6.7| 7.6) 8.2) 9.5 
A—“ Bastard ’’ (very poor), 4—** Bastard”’ (very poor). C—Immature wood 
of varying tints D—* Purple’’ (from tree on extremely poor marly bank ; tree ma- 
ture, but dead in nearly all ar including the roots), £—Immature wood of varying 
G—Red (tap root of nearly dead tree). 
/—Red (from roots of dead tree). 
tints. «Bastard ’”’ (mediu 
H—Red (tree over ripe ; a bored by ants). 
J—Red (best grade). 
More important, however, than the variations in the shades of 
color in the extracts was the fact, already noted, that the seguence 
of coloration intensity (in extracts made under like conditions in 
detail in each series) varied with each solvent (raBLE IV). This 
result not only shows that the colors of the woods are not due 
merely to different amounts of the same pigment but also proves 
that the pigmentary differences are caused either by varying pro- 
portions of at least two pigments, or by the same pigment radical 
in more than one chemical condition — in combinations, it may be 
of different solubilities and stoichiometric relationships, and of 
different dissociable tendencies. 
Relative tinctorial differences and variations are further shown 
in the following sample data, which indicate the quantity of water 
in cc. added to 10 cc. of 0.5 % Na,CO, extract (TABLE IV) 
in order to make the tinctorial intensity Sc ccaveately the same 
throughout the series.+ 
is sample contained several pigments. One of these was purplish and quite 
unlike any in the other samples. The pigment was especially soluble in water. It 
h an he volume of water furnished the basis of coloration 
for the comparative observation 
