256 
racter to the change of the third bands shown by the colouring 
matters soluble in alkalies. It may be pointed out that in the 
greenish blue part of the spectrum in all cases a very faint band 
appears in the more concentrated solution. Its position we ascer¬ 
tained in the case of a crystallized product (see below). 
The absorption spectra of the colouring matters formed by 
Wills tatter's reaction from the potassium salt of alkachlorophyll 
are quite similar to those shown by the substances produced from 
the calcium chloride sediment, as will be seen from the following 
measurements: 
Ethereal solutions of colouring matters soluble in alkalies 
A. Concentration 1 
Band I X 667 — 650 
„ II X 637 — 627 
„ III l 593 — 573 
„ IV X 553 — 533 
„ V X 519 -— 491 
and in 2 1 /, 0 / 0 HCl. 
B. Concentration 1 : 2 
X 667 — 655 
max. X 632 
i 588 — 572 
X 551 - 537 
X 516 — 493 
C. Concentration 1 : 3 
585 —572 
J 549 — 538 
X 513-5 - 496-5 
The last named concentration does not show the two first bands 
with sufficient distinctness. 
According to their intensity the bands may be placed in the 
following order: 
V > IV > III >11 = 1. 
In this respect the fraction in 2 1 / 2 % ac ^ shows a marked diffe¬ 
rence from the colouring matters taken up by 7, 10, and 12°/ 0 
acids. In the absorption spectra of these latter substances band IV 
is the strongest. Quite the same relations have been found in the 
case of colouring matters isolated from the calcium chloride sediment. 
Ethereal solution of colouring matter soluble in alkalies 
and in 5% HCl. 
B. Concentration 1 C. Concentration 1 : 2 
Band I X 673 — 654 Band I max. i 662 
II max. X 632 
III X 587 — 573 
IV X 550-5 — 538-5 
V X 517 —504 
Band III max. X 582 
IV 
V 
V 
X 554*5 
X 507 
f) 
