NEW BIOLOGICAL BOOKS 



301 



of the concentrated fractions fed on the 

 day of positive mating. Controls have 

 never given litters." 

 The topics discussed in this volume are: 



General characterization of the sterility disease 

 produced in rats by pure foods or other dietaries lack- 

 ing fat soluble vitamine E; the histopathology of 

 gestation in animals deprived of E; male sterility 

 with dietaries lacking E; on the widespread occur- 

 rence of initial fertility in animals reared on simpli- 

 fied diets; distribution of vitamine E in foods of ani- 

 mal origin; distribution of the vitamine in foods of 

 plant origin; proof of the existence of vitamine E in 

 the tissues of animals reared upon natural foods and 

 of its depletion in the tissues of animals reared upon 

 synthetic rations; the survival of fertility in animals 

 shifted from a diet possessing vitamine E to one 

 deprived of it; the presence of vitamine E in the 

 tissues of normal newborn young; proof of the use 

 of vitamine E in the ordinary metabolic processes of 

 the body; can an excess of vitamine E increase fer- 

 tility beyond normal limits; the successful parental 

 administration of vitamine E as a cure of sterility 

 in female rats; the efficacy of a single curative dose of 

 vitamine E administered at the beginning of gestation; 

 determination of the minimal effective dose of vita- 

 mine E in the cure of sterility in the female rat; how 

 late in gestation may we administer the vitamine to 

 ensure the birth of living young; the solubility of the 

 vitamine; stability of the vitamine; steps in the iso- 

 lation and concentration of vitamine E. 



This monograph is a worthy presenta- 

 tion of a fine piece of research. 



LECTURES ON THE BIOLOGIC AS- 

 PECTS OF COLLOID AND PHYSIO- 

 LOGIC CHEMISTRY. 



W. B. Saunders Company 

 $1.50 5! x 7!; Z44 Philadelphia 



There are six of these Mayo Foundation 

 lectures, by the following persons, and on 

 the indicated topics : Principles underlying 

 colloid chemistry, by Robert A. Millikan; 

 colloid chemistry in biology and medicine, 

 by Martin H. Fischer; the physical 

 properties of protoplasm, by Robert Cham- 

 bers; adsorption and vital phenomena, by 

 Ross A. Gortner; the physics of the ultra- 



microscope and optical properties of 

 colloid particles, by E. Franklin Burton; 

 the biological effects of light, by William 

 T. Bovie. 



This volume constitutes a useful popular 

 introduction to the colloid field. 



KURZES LEHRBUCH DER CHEMIS- 

 CHEN PHYSIOLOGIE. 

 By Ernst SchmitZ- S. Karger 



16.80 marks Berlin 



6? x 9I; vii + 384 

 The second edition of a general reading 

 text of physiological chemistry for medical 

 students. There is abundant citation of 

 the literature up to the middle of 192.6. 

 The chief relative value of the book, in 

 comparison with others on the subject, is 

 in its judicious and skillful condensation 

 of the essentials in a broad and actively 

 progressing field of biology. 



HANDBUCH DER BIOLOGISCHEN 

 ARBEITSMETHODEN. Lieferung 244. 

 Aminieren und Amidieren. 

 By Hans Sickel. Urban und Schwarzenberg 

 10 marks 7x10; zoo (paper) Berlin 



Lieferung 248. Elektrodialyse, by Mona 

 Spiegel-Adolf; Die Methoden %ur Bestim- 

 mung der Beweglichkeit und der Ladung 

 kolloider Teilchen, by Arne Tiselius; Mole- 

 kulargewichtsbestimmung der Eiweisskorper 

 durch Zentrifugierung, by Theodor Svedberg. 

 Urban und Schivar%enberg 

 7 marks 7 x 10; 1x5 (paper) Berlin 



Lieferung 254. Chemische Reaktionen Organ- 

 ischer Korper im Ultravioletten Licht und im 

 Licht der Sonne. 



By Franz. Backer. Urban und SchivarZjmberg 



3Z marks 7 x 10; 630 (paper) Berlin 



These three numbers of the Abderhalden 



Handbook deal with various aspects of 



