The Physical Properties of Colloidal Solutions Classic Reprint

Excerpt from The Physical Properties of Colloidal Solutions

The present attempt to give an outline of the study of colloidal Solutions has to do particularly with its interest to the student of Physics. Both by aim and necessity the writer has kept in mind the relation of colloids to the development of Physics. For this reason rather extended treatment is given of the development of the ultramicroscope and the confirmation of the kinetic theory of matter afforded by the theoretical and experimental study of the Brownian movement. When we come to deal with the phenomena of the charge possessed by the colloidal particle, the surface tension between the particle and the surrounding medium, and the mechanism of coagulation, we approach the most important problem of physics and chemistry, namely, the unfolding of the interaction of the ultimate particles of matter on one another.

The plan of the book is apparent from the table of contents. Under the head of preparation and classification, I have attempted to offer systematic tables of various classes of colloids having something in common, and have quoted types of methods of preparation to enable the reader to find out where to look for detailed information. Chapters III. To VII. Inclusive might be called the physics of colloidal study; they embrace the greater part of the book and will probably appeal particularly to the student of pure physics. In dealing with the question of the coagulation of sols, we come to the part of the subject on which probably the greatest amount of work has been done and from which we may expect most definite ideas as to the reason for the stability of colloidal solutions.

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