227 
visible in identical position which correspond to the following wave 
lensths: 
1:7 7659-630 
Ile, Zu — Sn — 
DEN 75 242"410 7 
in more concentrated solution in which II and III are united into 
one, there appears still another very faint band on the Na-line. 
We may add, that the dimethyl ether of haemin prepared accor- 
ding to the method of Nencki and Zaleski gives a spectrum closely 
resembling the above. The authors named found: 
I: 2— 647 — 630 
II: 4— 561 — 538 
III: A -- 518 — 500 
The addition of quinine, einchonine or ammonia to the chlo- 
roformie solutions of any one of the above substances (including 
the dimethylether) causes a very marked ehange in the spectrum, 
the colour turns also more reddish brown. The sufficiently diluted 
solutions show namely two bands: 
I: 2— 615 — 582 
II: 2 — 506 — 475 
The band in the more refrangible part of the spectrum is rather 
badly defined. 
An addition of acetie acid to these alkaline solutions causes 
the reappearance of the former spectrum with three bands. The 
aleoholie (neutral) solutions of haemin, as well as of its dimethylether 
are characterised by a different spreetrum than the chloroformie 
solutions. The first band is shifted towards the violet end of the 
speetrum, so that the less refrangible edge is more or less in the 
same position as the more refrangible edge of the first band of the 
ehloroformie solution. In the green and blue part there are no two 
distinet bands but only one, removed further towards the violet 
end of the spectrum than the third band of the chloroformie so- 
lution. In dilute solutions this second band is accompanied by 
a shadow on the less refrangible side. The absorption of the ultra- 
violet rays is very well pronounced. Haemin in chloroform solutions 
causes a band on the TI line whereas in ehloroformie solutions in 
