Outlines of Theoretical Chemistry

use of the numerical results of observations and measurements, and have avoided giving detailed descriptions of experimental methods.

The book has, therefore, in the main been written from memory, and numerical examples have been taken from the existing literature only where it appeared absolutely necessary for the clearer understanding of the subject. The general--I may say the philosophical-review of the subject has been my chief aim, to which the details should be subordinated. I may, perhaps, be permitted to express the hope that this mode of treatment will especially meet with approval in England, where so wide a circle of readers interest themselves in the general results and conclusions of scientific investigations.

LOTHAR MEYER.

TÜBINGEN: December 30, 1891.

TRANSLATORS' PREFACE.

THE reception which our translation of Lothar Meyer's 'Modern Theories' met with, has encouraged us to present to the public an English version of the author's smaller and less technical work on Chemical Philosophy.

The revised sheets have been submitted to the author, and we have gladly availed ourselves of the valuable suggestions he has made. As the nature of the book is set forth in the author's preface specially written for this translation, there remains only to add that we trust this book may not only be found valuable to the student of chemistry, but also to those who are interested in science generally.

January, 1892.

THE TRANSLATORS.