259 
description of the spectra of the red colouring matters obtained by 
us from allophyllotaonine by the action of alcoholic hydrochloric 
acid at elevated temperatures. 
First of all it is noteworthy that the conversion of allophyllo¬ 
taonine into phytorhodines takes place much more completely than 
of alkachlorophyll itself. This follows from the fact that the various 
fractions of the phytorhodines obtained in this case do not show 
a band in the red which appears in the crude solutions of the 
phytorhodines, obtained by the method of their discoverers, and 
which undoubtedly is caused by an admixture of colouring matters 
belonging to a quite different group of substances. Such a band 
appears only, and then it is but very faint, in the 12°/ 0 acid frac¬ 
tion of the colouring matters which are insoluble in alkalies. The 
fractions obtained by means of the weaker acids, such as 2*5, 5, 
7‘5 and 10°/ 05 do not show the band. The ability to crystallize is 
also in this case much greater. The less basic colouring matters, 
such as dissolve in 10 or 12°/ 0 crystallize equally well whether 
obtained by the old method or from allophyllotaonine, but whereas 
the stronger basic substances such as dissolving in 5 or 7% acid, 
obtained by the old method must undergo a series of purifications 
before they begin to crystallize, the corresponding substances ob¬ 
tained from allophyllotaonine crystallize with ease. 
In order to prove the identity of the spectra shown by substances 
of this and the former group the following measurements are quoted. 
Crude ethereal solution of the 12% acid fraction. 
A. Concentration 
1 
B. Concentration 1 : 3 
C. Concentration 1 : 6 
Band 
I 
l 663 — 
648 
max. X 654 
n 
II 
k 638 — 
629 
„ l 634 
r> 
III 
l 594 — 
569 
r shadow X 585 
j X 580 — 571-5 
max. 575 
r> 
IV 
l 555 — 
532 
X 551 — 538 
„ 544-5 
n 
V 
l 519 — 
486 
X 514 — 497 
„ 508 
According to their intensities the bands may be placed in the follo¬ 
wing order: 
IV > V > III > II > I. 
Band III is split up in concentration B into two bands. 
