ZOOLOGY AND BOTANY, MICROSCOPY, BTC. 
805 
(6) Miscellaneous- 
Chemical Nature and Chromatophily of Protoplasm.* — Herr E. 
Zacharias has endeavoured to determine the question whether the 
cyanophilous and erythrophilous properties of different constituents of 
animal and vegetable cells are connected, or not, with other differences 
in the nature of these constituents. His observations were made on 
spermatozoa of the salmon and of Triton , on the epiderm of young leaves 
of Galanthus nivalis , the endosperm of Bicinus , pollen-grains, &c. His 
conclusion is opposed to that of Strasburger that the different reaction 
towards pigments is the result of a different degree of nutrition of the 
cell or of the nucleus. 
He regards protoplasm and nucleus as consisting largely of substances 
which are insoluble in artificial digestive fluid. To these substances 
belong the greater part of the chromatin-substance of the nucleus 
(nuclein). The remaining insoluble albuminous portions of the cell- 
contents (plastin) differ in their reactions. In addition to these sub- 
stances, cell-protoplasm aud nucleus contain albumen soluble in the 
digestive fluid ; this is especially abundant in the nucleoli. 
* Ber. Deutsch. Bot. Gesell., xi. (1893) pp. 1880-9G, 293-37. 
