ae REPORTS ON THE STATE OF SCIENCE.—1918. 
Uses three diaphragms instead of two and places tan liquor 
next the hides in a separate compartment between the hides 
and the cathode. Anode, cathode and hides are immersed in 
water. On passing current acid and basic impurities in the 
tan liquor are electrolyzed out and carried into the anode and _ 
cathode compartments, after which tannin is said to migrate 
into compartment containing hides. Process seems hopelessly 
complicated and not at all practical. Theory of process not 
very clear. 
21448, Oct. 28. B. Schwerin. Gelatin or glue placed between 
diaphragms impervious to glutin and electrolyzed a cell con- 
taining anode, cathode and gelatin compartments. Soluble 
electrolytes removed and albumins precipitated. Other com- 
plicated modifications are described. Combined electrical 
dialysis and ultrafiltration process. 
21483, Oct. 24, Gesellschaft ftir Elektro-osmose (Schwerin). 
Cf. 21448 (1914). Uses hide or leather waste between 
diaphragms instead of glue. : 
1915-1916. 
6727, May 5. Elektro-osmose, Akt. (Gesellschaft (Schwerin). 
Electrical purification of alumins. Cf. 21448 (1914). 
7212, May 18. LElektro-osmose Akt. Gesellschaft (Schwerin). 
Cf. 6727. Electrical purification of alumina. 
7590, May 20. Elektro-osmose Akt. Gesellschaft (Schwerin). 
Use of centrifuge to hasten preliminary settling process in the 
“ electro-osmotic” purification of clay. 
9565, 9566, June 380. Hlektro-osmose, Akt. Gesellschaft (Schwerin). 
Electrical purification of dyes. Dye suspension placed in inner 
compartment and shielded from oxidizing and reducing action 
of electrodes, by means of diaphragms impervious to dyes. 
Cf. 21448 (1914). 
11659, Aug. 12. Elektro-osmose, Akt. Gesellschaft (Schwerin). 
Treatment of clay. 
COLLOID-CHEMISTRY IN THE TEXTILE INDUSTRIES : 
W. HARRISON, M.Sc., Lecturer in Textile Chemistry, 
The University, Leeds. 
INTRODUCTION. 
ALTHOUGH a considerable amount of research work has been done 
on the chemistry of textile fibres, particularly cotton, no definite 
information has been obtained on the chemical constitution of the 
substances composing them. The colloidal nature of these sub- 
stances always stands in the way of pure chemical research. There 
are many processes used in the textile industry where a knowledge 
of the chemical constitution of the substances composing fibres is 
unnecessary, the changes produced being more physical than 
chemical. Chemists are naturally attracted by the idea that all the 
physical properties of a substance are dependent on the chemical 
constitution of its molecules, but the properties of colloidal barium 
PS Songs eS a 
