First published in 1936, this volume contains six of the Halley Stewart Lectures - originally founded "For Research towards the Christian Ideal in All Social Life" - by some of the greatest of English scientists of the mid-20th century, each a leading authority in his respective field: cosmology, physics, meteorology, medicine and genetics. The final lecture considers the relationship between scientific knowledge and human ideals, commenting on the paradox that a century which produced such scientific advance also witnessed the most concentrated period of social, economic and political turmoil in world history.

First published in 1936, this volume contains six of the Halley Stewart Lectures - originally founded "For Research towards the Christian Ideal in All Social Life" - by some of the greatest of English scientists of the mid-20th century, each a leading authority in his respective field: cosmology, physics, meteorology, medicine and genetics. The final lecture considers the relationship between scientific knowledge and human ideals, commenting on the paradox that a century which produced such scientific advance also witnessed the most concentrated period of social, economic and political turmoil in world history.

In this dazzling collection of essays covering a broad range of fields, from Darwinism and the global population explosion to bird watching, distinguished scientist and philosopher Sir Julian Huxley points out new frontiers for scientific research and reaffirms his belief in the intimate connection of the sciences, particularly biology, with the pressing social problems of the present and future. Huxley envisions new horizons for education and divinity within the framework of evolutionary humanism.

Originally published in 1934 as part of the Cambridge Comparative Physiology series, this book discusses the process of tissue differentiation in developing embryos of a variety of species. Huxley and de Beer examine important aspects of development such as symmetry, the mosaic stage of differentiation and the relationship between hereditary factors and differentiation. This book will be of value to anyone with an interest in the history of science or embryology.

Originally published during the early part of the twentieth century, the Cambridge Manuals of Science and Literature were designed to provide concise introductions to a broad range of topics. They were written by experts for the general reader and combined a comprehensive approach to knowledge with an emphasis on accessibility. The Individual in the Animal Kingdom by Julian Huxley was first published in 1912. The text contains an interdisciplinary discussion of individuality in nature, taking influence from both biology and philosophy.

This detailed study of the different rates of growth of parts of the body relative to the body as a whole represents Sir Julian Huxley's great contribution to analytical morphology, and it is still a basis for modern investigations in morphometrics and evolutionary biology. Huxley was the first to put the concept of relative growth - or allometry - upon a firm mathematical foundation, and since publication of this book in 1932, his work has been found to have greater implications than even he imagined. Problems of Relative Growth is at once a formulation of the basic principles of allometry and a survey of its many and various occurrences and applications. Examples are taken from such widely divergent areas as the development of the large claw in male fiddler-crabs, the size and number of points of deer antlers, heterogony in neuter social insects, the disproportionate growth of the human head from infancy to adulthood, and the formation of spiral shapes in certain mollusk shells and of the curved shape of the rhinoceros' horn. Starting from the fact of obvious disharmonic growth, Huxley formulates his first and fundamental law - that of the Constant Differential Growth Ratio. He then demonstrates that the distribution of growth potential occurs in an orderly and systematic way - that there are growth-gradients culminating in growth-centers. Other topics treated include multiplicative and accretionary kinds of growth, the role of hormones and mutations, and the relevance of the entire investigation to the problems of orthogenesis, recapitulation, vestigial organs, the existence of nonadaptive characters, physiological genetics, comparative physiology, and systematics. In theirintroduction to this unabridged facsimile republication of the original 1932 edition, Frederick B. Churchill and Richard E. Strauss place Huxley's work in the context of modern research in history and biology.