Good evening and welcome to boring books for bedtime. I hope tonight's installment provides all the boredom your busy brain needs to quiet down and let you get some sleep for once.

So lie back, adjust your volume, take a nice deep breath, and off we go.

Tonight will be relaxing to one of the great works of science.

It's the principles of science. It's the Principles of Chemistry by Dimitri Mendelaeuf, translated from the Russian

by George Cominsky, ARS M, of the Imperial Mint, St. Petersburg,

member of the Russian Physico Chemical Society.

edited by T.A. Lawson. B.S.C.

P.D.

Examiner in Koltar Products to the City and Guild of London, Institute Fellow of the Institute of Chemistry.

Published by Longman's Green and Co, 39 Paternoster Row, London, New York, and Bombay, 1897,

in two volumes. Volume 1, preface to the English translation. The first English

edition of this work was published in 1891 and that a second edition is now called for is we think a sufficient proof that the enthusiasm of the author for his science and the philosophical method of his teaching have been duly appreciated by English chemists.

In the scientific work to which Professor Mendelayev's life has been devoted, his

continual endeavor has been to bring the scattered facts of chemistry within the domain of law. And accordingly in his teaching he

endeavors to impress upon the student the principles of the science, the

generalizations so far as they have been discovered, under which the facts naturally

group themselves.

Of those generalizations, the periodic law is perhaps the most important that has been put forward since the establishment of the atomic theory.

It is therefore interesting to note that Professor Mendelaeuf was led to its discovery in preparing

the first Russian edition of this book.

It is natural too that the further application and development of that generalization

should be the principal feature of this, the latest edition.

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