Note 16 bis — Chapter I · ON WATER AND ITS COMPOUNDS
George Kamensky translation
Graham, in the jelly formed by gelatine, and De Vries in gelatinous silica (Chapter XVIII.) most frequently employed coloured (tinted) substances, for instance, K2Cr2O7, which showed the rate of diffusion with very great clearness. Prof. Oumoff employed the method described in Chapter X., Note 17, for this purpose.