The author offers this work, not as a final word, but as a suggestion for further investigation. The field he enters is not without interest to the popular mind nor without possibilities to the investigator, but it certainly is a field of scientific research hitherto unentered to such an extent. Five of the chapters have, in substance, previously appeared in print; the rest of the material is new. The work will be of interest not only to the casual reader, but particularly to medical men, although it presents facts which, in the main, are well known by physicians. But here they are collected and presented in sequential form. It is the author's aim to set forth the influence of weather on human passions, crime and mental growth and development. Among subjects considered are the sources and nature of weather proverbs, animal weather lore, the weather lore of the "skyey influences,"