BULLETIN INTERNATIONAL 
DE L’ACADÉMIE DES SCIENCES DE CRACOVIE. 
CLASSE DES SCIENCES MATHÉMATIQUES ET NATURELLES. 
N° 3. Mars 1908. 
Sommaire: 12. L. MARCHLEWSKI and ST. PIASECKI. A simple method for 
preparing 1 phylloporphyrine. 
13. LAD. “NATANSON. On the elliptic polarization of light transmitted through 
an absorbing gaseous medium, parallel to the lines of an extraneous magnetic 
field. 
14. J. BROWINSKI et S. DABROWSKI. Sur une méthode de dosage de la 
matière colorante fondamentale des urines. 
15. H. ZAPALOWICZ. Revue critique de la Flore de la Galicie. XII Partie. 
16. J. MLODOWSKA. Zur Histogenèse der Skelett-Muskeln. 
17. CH. KLECKI et A. WRZOSEK. Étude expérimentale du passage dans les 
urines de microbes circulant dans le sang. 
18. FR. KRZYSZTALOWICZ et M. SIEDLECKI. Etude expérimentale de la 
syphilis ; morphologie de Spirochaeta pallida. 
Séance du lundi 2 Mars 1908. 
Pkéstdknok DK M. K. OLSZEWSKI. 
12. Uproszczona metoda otrzymywania filoporfiryny. — 
A simple method for preparing phylloporphyrine . Mé¬ 
moire de MM. L MARCHLEWSKI m. t. et ST. PIASECKI. 
The best method hitherto used for the preparation of phyllopor¬ 
phyrine consisted in heading phyllotaonine with an alcoholic solution 
of potassium hydrate to high temperatures under pressure. The 
preparation of phyllotaonine is however a very tedious process and 
although by the discovery of allophyllotaonine 1 ) that preparation 
from aleachlorophyll is much simplified, as will be shown in due 
course, phyllotaonine is still a very costly starting material for the 
preparation of other chlorophyll derivatives. 
Having discovered the fact that phylloporphyrine may be con¬ 
verted easily into a substance closely resembling haemin 2 ) and 
wishing to study that substance in general more closely it was 
imperative to seek for a simple method of preparation of phyllo- 
Comp, this Bulletin 1907, p. 616. 
2 ) Comp, this Bulletin 1907, p. 57. 
Bulletin in. 
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