Originally published in 1914, this book examines several key points of biological science through the lens of philosophy. Johnstone addresses the questions of consciousness, evolution and the activities of the organism, among others, with a special focus on the work of Driesch and Bergson. This book will be of value to anyone with an interest in the philosophy of science.

By an “organism” I mean a living thing, in the most ordinary sense. There is an “organic theory of nature” in which the term “organism” is extended so as to include atoms, molecules, crystals, colloidal micelles, etc.; such constellations of parts have been called “inorganic organisms” by Driesch. I shall regard them as the “results of organization.” As we know them they are “models” , and they exist in the minds of physicists just as differential equations are in the minds (...) of mathematicians. They express arrangements just as a trade union is an arrangement, and just as artifacts, such as the nest of a chaffinch or the sleeping-bag of an Arctic explorer, are expressions of arrangements. (shrink)

By an “organism” I mean a living thing, in the most ordinary sense. There is an “organic theory of nature” in which the term “organism” is extended so as to include atoms, molecules, crystals, colloidal micelles, etc.; such constellations of parts have been called “inorganic organisms” by Driesch. I shall regard them as the “results of organization.” As we know them they are “models”, and they exist in the minds of physicists just as differential equations are in the minds of (...) mathematicians. They express arrangements just as a trade union is an arrangement, and just as artifacts, such as the nest of a chaffinch or the sleeping-bag of an Arctic explorer, are expressions of arrangements. (shrink)

Consider two fairly simple, natural occurrences: a storm at sea and an earthquake. Many descriptions of these things have been made, but what interests us here are their scientific descriptions. In the first case, then, we have to deal with changes in the pressure and temperature of the atmosphere, with violent motions of the air and with waves in the sea. In the second case we deal with stratified rocks that are in a state of severe strain. When this strain (...) exceeds a certain limit the rocks are fractured and waves are set up in the elastic materials of the earth's crust. In most cases storms and earthquakes happen when we do not expect them, and so there is usually little time to investigate them in an adequate manner. But there is no doubt whatever that if we could make all the researches that are practicable we could “ explain” individual storms and earthquakes. “Explanation” means re-describing the phenomena in the simplest manner possible, that is, in terms of space, time, gravitation, energy-transformations, chemical constitution of the materials concerned, etc. Such explanations can be made of the occurrences mentioned above, and the physical ideas we have noted are all that are included in the explanations. (shrink)