Modern Trends in Physiology and Biochemistry

apparently had some qualms) there can be disagreement; since further experience will doubtless settle these questions, there is no point discussing any of them here. The text is divided into twenty chapters, grouped in three units, on nutrition, metabolism, and growth and development. The first unit treats photosynthesis, mineral and water relations, and translocation. The second part includes chapters on enzymes, carbohydrates, respiration, and other metabolic processes and substances. This is essentially a brief treatment of plant biochemistry, assuming on the student's, part a knowledge of elementary chemistry and botany. The last unit, on growth and development, includes lengthy discussions of growth substances and the physiology of reproduction and differentiation. There is also a short section, "Plant and Environment," on the autecological aspects of physiology.