NEw SERiEs FIA PI513 SUBSCRIPTION, $6.00VOL. 81, No. 2101 FRIDAY, APRIL 5, 1935 SINGLE COPIES, .15

BOGERT'S I WILLIAMS'NUTRITION HYGIENE

and PHYSICAL FITNESS and SANITATIONNEW EDITION. A great deal of new ma-terial has been added in revising this widely-accepted textbook for the new (2nd) edition.Dr. Bogert clearly sets forth the new quantita-tive basis of measurement, giving tables whichshow the exact number of units in the vitamin-rich foods. Detailed consideration is given tothe function of the vitamins, to the symptomsof low-grade shortage, and the importance ofhigh-vitamin diet. There has been added acompletely new section on Constipation.The practical teaching experience of Dr. Bogerthas enabled her to write a textbook that has,from the day of first publication, been giventhe highest commendation by teachers and stu-dents. She brings out clearly and impressivelythe essentials of nutrition and the practicalapplication of the study in the development ofthe body and in the maintenance of health.Just a few of the topics discussed are classifi-cation of foods, nutritional requirements, pro-cesses by which the body utilizes food, planningand preparing meals, diets for children, foradults, for expectant mothers, in obesity, andin malnutrition.

By L. JEAN BOGERT, Ph.D., formerly Instructor in Medicine,University of Chicago; Consultant in Nutrition, DelineatorInstitute. 566 pages. Cloth, $3.00 net.

NEW EDMON. The direct and highly-ex-pressive style of Dr. Williams has made it pos-sible to put in one volume the fundamentals ofpersonal hygiene and sanitation. This planbenefits both teacher and student not alonethrough the economy achieved but through thecontinuity of thought and teaching approach.Health care is the predominant note through-out the entire text. Dr. Williams effectuallydemonstrates its application in numerous prac-tical teaching approaches. He tells whathealth is; he shows its scientific foundations;its economic and sociologic aspects, and pointsout something of the future of health activities.He sums up the many factors, both physicaland mental, entering into the teaching andapplication of personal health and sanitation.

Not only does this book consider the health careof the individual, but also of the community,the home, the factory, the city, state, and na-tion, rounding out the discussion with a con-sideration of hygiene and sanitation on aninternational basis.

By JESSE FEIRING WILLIAMS, M.D., Professor of PhysicalEducation, Teachers College, Columbia University. 372pages, illustrated. Cloth, $2.00 net.

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2 SCENCEADVRTISMENT VO. 81 No.210

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2 SCIENCE-ADVERTISEMENTS VOL. 81, NO. 2101

SCIENCE-ADVERTISEMENTS

MUSEUM PREPARATIONSTo an already long list Milvay now adds a newseries of liquid zoological preparations destinedto fill a very definite and long felt need in theeducational biological laboratory due to the speci-mens being of the most representative types.As with all Milvay products, these new mountsare prepared with the greatest of skill and with akeen foresight into the requirements of moderneducational methods. They are scientifically ar-ranged and neatly mounted on white opal glassplates in cylindrical crystal. museum jars havingclear glass tops that permit complete penetrationof light.This new series comprises the following groups,each containing ample specimens to fully portraylife cycles, structures, adaptations and other in-terest-arousing characteristics:Phyla Porifera . . . Coelenterata . . . Platyhel-minthes.. . . Nemathelminthes . . Echinodermata... Annelida. . . Mollusca... Arthropoda and twogroups of Chordata.

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VOL. 81, No. 21016 SCIENCE-ADVERTISEMENTS

APRIL 5, 1935 SCIENCE-ADVERTISEMENTS 7

From the author 's preface to the new third edition:"It so happens that during the past few years there

have been a number of notable advances in both thecontent and point of view of botanical science which theauthor of a textbook can no longer afford to ignore.These have consequently been incorporated into the pres-ent revision, thus necessitating a few drastic changes,although the general treatment of other topics remainsessentially as before."The most radical alteration has been made in the

phylogeny and classification of the vascular plants. Ascommonly presented in elementary courses this subjecthas for some time been in need of a thorough revision.The remarkable discoveries of recent years with regardto the character of the earliest known land plants, thePsilophytales of the Devonian, have provided us with abasis from which to derive the three main lines of vas-cular plants which are now so clearly distinguishable,and which for some time have been designated as theLycopsida, the Sphenopsida, and the Pteropsida. Theevolution of the modern seed-bearing plants-the Gym-nosperms and the Angiosperms-from the last of thethree is universally admitted, but the name Sperma-tophytes for these plants is evidently a misnomer, sincethe seed-bearing habit has evidently arisen a number oftimes and in other groups. The time-honored termsPteridophyta and Spermatophyta and the groupings whichthese designate have therefore been discarded in favorof a more natural classification and a more appropriatenomenclature. For the vascular plants as a whole theterm Tracheophyta is here proposed, as cognate withThallophyta and Bryophyta. In revising his classifica-

tion of the higher plants the author has been guidedprimarily by the conclusions and suggestions of Profes-sor Arthur J. Eames of Cornell University, the outstand-ing authority in this field, to whom he wishes here toexpress his sincere thanks for frequent counsel."The other important innovation in the present re-

vision is a chapter on Morphogenesis, or experimentalmorphology. This field of botanical science is progress-ing so rapidly and seems destined to occupy such animportant place that even the beginning student shouldbecome acquainted with the point of view which it pre-sents. The most characteristic feature of living organ-isms is their possession of specific shapes, and the fac-tors which are responsible for the development of theseshapes are thus of great importance biologically. Mor-phogenetic problems are of significance not only to mor-phology, but to physiology, cytology, and genetics, aswell."Aside from these two major changes the book has

been brought up to date at many other points, and to aconsiderable extent has been completely rewritten. Inmany instances the treatment of the subject matter ismore extensive and detailed than before. Especial atten-tion has been paid to better illustrations. Seventy-sixnew ones have been added, of which sixty-six were pre-pared expressly for this book. The 'Questions forThought and Discussion' have been revised, a few beingeliminated and about seventy new ones added. . . . Thenumber of chapters has been considerably increased be-cause of the subdivision of the last four into smallerunits. The book as a whole is somewhat larger and nowcontains ample material for a full year 's course."

Two hundred fifty-five colleges and universities throughout the countryadopted previous editions of this successful text. We urge that you send now foran on-approval copy of the new third edition, so that you can see for yourself howan excellent text has been made even better.

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BV EDMUND W. SINNOTTProfessor of Botany, Barnard College, Columbia University

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APRIL 5, 1935 SCIENCE-ADVERTISEMENTS 9

S U P P L I E S