26 REPORTS ON THE STATE OF SCIENCE.—1918. 
R. E. LIESEGANG, The history of the agates. Aus der Natur, 18, 561 (1911). 
9 E. HatscHEk, The formation of strata in heterogeneous systems. Koll.-Zeitschr. 
, 97 (1911). 
R. E. LIgseGane, Agate Problems, Zentralb. Mineral. Geol. u. Palacontol., 16, 
497 (1911). ‘ 
E. HatscHEK, A study of some reactions in gels. Journ. Soc. Chem. Ind., 30, 
255 (1911). 
R. E. LizseGanc, The behaviour of edges and corners in some diffusion ex- 
periments, Koll.-Zeitschr., 9, 296 (1911). 
KE. HATSCHEK, Reactions in gels and the form and size of the particles of the in- 
soluble product of reaction, Koll.-Zeitschr., 8, 193 (1911). 
R. E. LIEsEGANG, Protoplasm structures and their dynamics, Roux’s Arch. 
Entwichelungsmech., 34, 452 (1912). 
E. HatscHEK, Reactions in silicic acid gels, Koll.-Zeitschr., 9, 11 (1912). 
E. HatscHeKk, The theory of Liesegang’s stratifications, Koll.-Zeitschr., 10, 
124 (1912). 
E. KUESTER, On zone formation in colloidal media, Jena, 1913. 
E. KvuEstTER, Contributions towards the knowledge of Liesegang’s rings and 
cognate phenomena, Koll.-Zeitschr., 13, 192 (1913). 
R. E. Lr=zseGaneG, On stratified disperse systems, Koll.-Zeitschr., 12, 74 and 12, 
269 (1913). 
E. HatscHEK and A. Simon, Gels in relation to ore deposition, Trans. Inst. Min. 
§ Met., 21, 451 (1912). 
E. HatscHEeK, The theory of Liesegang’s stratifications, Koll.-Zeitschr., 14, 
115 (1914). 
R, E. LIESEGANG, Geological diffusions, Leipzig, 1914. 
R. E. LizszeGane, The action of crystalline nuclei in gels, Koll.-Zeitschr., 16, 
76 (1915). 
R. EH. LIESEGANG, Silver chromate rings and spirals, Zeitschr. phys. Chem., 88, 
1 (1914). 
E. Kuxster, The morphological characteristics of Liesegang’s rings, Koll.- 
Zeitschr., 18, 107 (1916). 
F. KoeHuLer, Rhythmical reactions, Koll.-Zeitschr., 20, 65 (1916). 
S. C. Braprorp, Adsorptive stratification in gels, Biochem. Journ., 10, 169 
(1916) ; 11, 14 (1917). 
W. MorLLeR, Rhythmical diffusion structures in gelatin-salt jellies, Koll. 
Zeitschr., 19, 209 (1916) ; 20, 242 (1917). 
ELECTRICAL ENDOSMOSE. I. 
By T. R. Briees, Cornell University. 
1. Electrical Endosmose, Cataphoresis and Allied Phenomena. 
On passing an electric current through a porous diaphragm 
immersed in a liquid, one often observes a flowing of the liquid 
through the diaphragm ; this flow is commonly from the anode to 
cathode, but may take place in the opposite direction. This curious 
phenomenon was described first by Reuss,! working at Moscow, in 
1808, and to it has been given the name electrical endosmose. Reuss, 
who employed clay diaphragms in water, noticed that, as the current 
forced water through the clay toward the negative pole (cathode), 
there also occurred migration of suspended clay particles in the 
direction of the positive pole (the anode). This migration of 
particles in suspension has come in time to be called cataphoresis, 
and the term should be limited to this meaning. There has arisen, 
however, a great deal of confusion regarding the use of the two 
expressions, electrical endosmose being employed to include 
1 Wiedemann, Hlektricitdt, 1, 1007 (1893). 
