April 28, 1883. tion, and is thus a contrast to the last lecture. It illustrates, even in a more striking manner than the first two lectures, the relations of modern physiology to the physiology of our forefathers. The latter were engaged in observing and explaining the more obvious phenomena, whilst the modern physiologists are pushing their researches further, and are endeavouring to study the hidden phenomena which, like a second order, lie behind these. It need scarcely be added that even

more »

... e results of modern research are not to be regarded as final, although we see a little further and more clearly than those who went before. There is still uncertainty as to fact and obscurity as to explanation in most departments of physiological science, and not least as regards the function of respiration.