“Dr. Herbert will be found a safe guide.  He writes as clearly and as simply as may be upon a subject in which it is practically impossible to avoid technical language....  The book may be cordially recommended as admirably adapted for the class for whom it is intended.” Westminster Gazette.

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THE FIRST PRINCIPLES OF EVOLUTION

90 Illustrations.  Large Crown 8vo.  Cloth, 12s. 6d. net (by post, 13s. 6d.). Revised Edition.

“The author attempts to examine and test the principles of the theory of evolution as applied to the known phenomena of the cosmos.  To do this at all satisfactorily in little more than 300 pages, and at the same time bring under review all that is most valuable in recent scientific research, is no easy task.  We may say at once that, in our opinion Dr. Herbert has succeeded wonderfully well.”—­Athenaeum.

“Contains not a single dry page—­far and away the most compact and complete account of evolution in all its aspects.”—­Globe.

“We congratulate Dr. Herbert on his masterly arrangement....  It will serve as an admirable introduction to a difficult subject.”—­Dundee Advertiser.

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AN INTRODUCTION TO THE
PHYSIOLOGY AND PSYCHOLOGY OF SEX

49 Illustrations.  Large Crown 8vo.  Cloth. 7s.6d. net (by post, 8s. 1d.).

This fills a gap in the literature of sex.  It gathers together for the general reader a vast array of facts about sex, mating and reproduction which have never before been so clearly and directly stated.

“For a simple statement, expressed in language as far as possible free from technicalities, of the principal phenomena of generation, Dr. Herbert’s book is the best that we have seen.”—­Cambridge Review.

“It is therefore a real satisfaction to find a sex manual which may be placed with confidence in the hands of any educated person....  He has certainly produced the best little manual which we yet possess in this field.”—­HAVELOCK ELLIS in Eugenics Review.

* * * * *

BY MRS. HERBERT.

SEX LORE.  A Primer on Courtship, Marriage and Parenthood. 55 Illustrations.  Crown 8vo.  Cloth, 7s. 6d. net (by post, 8s. 1d.).

“The author in simple, non-technical language expounds the main facts of sex, especially with regard to biology and physiology, and she treats this delicate subject in a tactful manner.  A special feature of the book is the large number of illustrations.  The volume is intended for the ’younger generation,’ but parents and teachers would be well advised to peruse the book, which should prove invaluable for educative purposes. ’—­Medical Times.

“... may be left with confidence in the hands of any educated person who is attaining to manhood or womanhood.”—­Aberdeen Daily Journal.