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itu me different methovestigation, directions to the subject o
By CHARLES J. CHAMBERLAIN
postpaid $2.39 'HE first complete manual to be published on the subject of botanical micro
technique. It contains detailed directions for collecting and preparing plant material for microscopic investigation, setting forth the advantages and disadvantages of the different methods.
"Will no doubt find a place in every well-regu- “It is an excellent book for the individual lated library, and will be found very useful by worker and for classes in colleges." - Education. private students." - Plant World. A Laboratory Guide in Bacteriology
By PAUL G. HEINEMANN 158 pages, Interleaved, with 37 illustrations, 12mo, cloth; net $1.50, postpald $1.61 CLEAR and concise presentation of bacteriological technique, designed prinA cipally as a manual for the medical student, but highly useful also as a reference book for the biological teacher and investigator, as well as for practical workers in the fields of medicine and hygiene.
"The instruction given is clear and accurate, “The directions are clear and concise, and every and the practical exercises are well selected." – stage is described so carefully that it is hard to see The Lancet (London).
how the student can go astray. Physicians who "A book such as this must facilitate very greatly
are rusty in bacteriology cannot do better than buy the practical class work, for which it is most ex
this little book. The book is beautifully printed
and bound.” – American Journal of Clinical Medicellently adapted." — American Journal of Medical
By MICHAEL F. GUYER
250 pages, 8vo, cloth: net $1.75, postpaid $1.88 'HE title of this book will explain its scope. It is intended as a laboratory
manual for textbook use. Its aim is to introduce the student to the technique of microscopic anatomy and embryology, emphasizing details of procedure rather than descriptions of reagents or apparatus. Sufficient account of the theoretical side of microscopy is given to enable the student to get satisfactory results from his microscope.
The directions are simple, explicit, and com- A concise, eminently practical, and well-classiplete. — American Journal of Clinical Medicine. fied treatment. - Science.
The medical student will find it very useful as a The expositions of the methods recommended guide to microscopic work. – Journal of the Amer- are admirably clear. - Nature. ican Medical Association.
One of the best and most practical works upon This is one of the cleanest works on microscop- microscopic technique with which we are acical technique we have ever seen, and is especially quainted. — American Naturalist. suitable for the beginner. It is full of points, As a textbook it can hardly be improved. The tricks of technique not mentioned in other works, research worker will find in this book just the inand is one that every student and physician should formation he frequently needs in preparing mahave. — Medical Century
terial with which he is not familiar. — School This valuable book is strong through its rigid
Review. exclusion of the trite and the conflicting. It is It does present in very clear form a judicious lucid and helpful, because a man long practiced in selection of methods, including an excellent unpractical work has given what he believes the technical account of the microscope and its optical most expeditious and reliable method of obtaining principles, adequate for the undergraduate course a definite and comprehensive result. — Medical in histology. – Journal of Comparative Neurology Notes and Queries.
and Psychology ADDRESS DEPT. 62
The University of Chicago Press
A Monthly Journal, established in 1867, Devoted to the Advancement of the Biological Sciences
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CONTENTS OF THE MAY NUMBER
The Categories of Variation. Professor 8. J. HOLXIS
The General Entomological Ecology of the Indian Con
Plant. S. A. FORBES.
CONTENTS OF THE APRIL NUMBER
PORT and CHARLES C. DAVENPORT.
Vascular Anatomy and the Reproductive Structures.
Professor John M, COULTER.
Decade. Professor EDWARD C, JEPFREY.
Degree of Accuracy of the Biometric Constants, DR.
Breeding. O. F. COOK.
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Notes and Literature: Biometrics-Some Recent Studies
on Growth. DR. RAYMOND PEARL Firperimental
OONTENTS OF THE JUNE NUMBER
Professor H. S. JENNINGS.
ness an Advantage to Flowers? JOHN H. LOVELL. Variation in the Number of Seeds per Pod in the
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The Trend of Ecological Philosophy. Professor
Ecology. DR. BURTOX LIVINGSTON,
De Vries's Species and Varieties, DR. GEORGE F
CONTENTS OF THE JULY NUMBER
Dr. RAYMOND PEARL and FRAXK M. SURFACE
ALEXANDER G, RUTUVEN.
Altitude. Professor CHARLES H. SHAW.
Swamp Deposits in Virginia Dr. EDWARD W.
delian Heredity. Dr. W. J. SPILLHAN.
CONTENTS OF THE AUGUST NUMBER
E, A. ANDREWS.
Professor VOLNEY M. SPAULDING,
Professor EDGAR N. TRANSEAU.
heritance of Coat Colors in Mice, Professor T, H,
CONTENTS OF SEPTEMBER NUMBER
and South America, Dr. R. F. SCHARY.
Peruvian Zoological Province. Dr. WILLIAN HE
American Coast : Hybridism ; Multiplicity of RETE
Distribution : Professor A, E VERRILL
tive Elimination of Ovaries in the Fruiting of the
Leguminosæ : Dr. R. HARRIS.
President DAVID STARR JORDAX. Parasitology
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The Origin of a Land Flora. A Theory based upon the facts of Alternation.
Cloth, gilt top, zi+727 pp., illus., index, 8vo, $5.50 net. NOTE.-A profound study in the morphology of the lowest forms of plants, with special reference to the development of their reproductive systems. The author endeavors to show that the present land fora has originated from an aquatic ancestor, and traces the methods of specialization to the land babit, and the establishment of the forms of the higher plants. A book of the highest importance not only to botanists but to biologists in general.
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Re-issues of the highly ralued Hand-Books known as the Garden Craft and Rural Science Series, edited by L. 71. BAILEY, of Cornell University, Editor of “ Cyclopedia of American Horticulture," “ Cyclopedia of American Agriculture,” etc.
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THE AMERICAN TOAD (BUFO LENTIGINOSUS
A STUDY IN DYNAMIC BIOLOGY
For some years it has been my desire to inaugurate a series of university theses aimed distinctively at studying important American species as forces in nature. This kind of work has seemed to me logically the next step in the advance of American natural history. In fact, it is hard to imagine any other line of real advance possible. Species are not discovered, determined, named and classified for the mere sake of making it possible for people to learn their names.
No matter how common the species, when we ask the questions: What does it do in the economy of nature? What position does it occupy in the vital organization of American natural history? What are its relations to human interests? In short, what expression have we of the species as a force in nature? When we ask these questions of the commonest animals, we find ourselves almost as near the verge of human knowledge as with an undiscovered species. No less a man than Darwin himself led off in the field of dynamic biology with his study of "Earthworms and Vegetable Mould.” A