From the List of New Publications 



Anatomy of the Wood Rat $5.00 



By A. Brazier Howell 



The first comprehensive study of the common North American wood 

 rat. Discusses internal anatomy. Comparative in treatment. Num- 

 ber one of the Monographs of the American Society of Mammalogists. 

 Cloth. 6x9. 224 pages, fully illustrated in color and black and white. 

 Bibliography. 



Local Immunization $3.50 



By A. Besredka, translated by Dr. Harry Plotz. 



Presents a new and revolutionary view of immunity, a new method of 

 vaccination, a new method of treatment, growing out of the author's 

 researches at the Pasteur Institute. A book of importance to the whole 

 medical profession. Cloth. 5x8. 216 pages. Index. Bibliography. 



Significance of the Physical Constitution in 



Mental Disease $2.50 



By F. I. Wertheimer and F. E. Hesketh. Preface by L. F. Barker. 



Traces the development of the conception of body types and their 

 relation to mental function and mental disease, with an analysis of 

 anthropometric methods as they relate to psychiatry. Cloth. 6x9. 

 76 pages, copiously illustrated. Bibliography. Index. 



Symbionticism and the Origin of Species $3.00 



By Ivan E. Wallin 



Tiny bodies, called mitochondria, found in the cells of all living things 

 are themselves living organisms, says the author. Their presence may 

 give rise to new tissue and organs. Therefore they may be the clue to 

 unraveling the perplexing mystery of the origin of species, the author 

 argues. You may not agree, but you will find the theory worthy of 

 consideration. Cloth. 6x9. 171 pages, illustrated. Bibliography. 

 Index. 



THE WILLIAMS & WILKINS COMPANY 



Publishers of Scientific Books and Periodicals 



BALTIMORE, U. S. A. 



