Appletons' Popular Science Monthly, January 1900, Volume 56, November 1899 - April 1900, by various authors, is a publication that offers the reader a unique opportunity to immerse himself in the world of science at the beginning of the 20th century. In this issue you will find interesting articles and research from various fields of science: from astronomy and physics to biology and psychology. Each page is filled with interesting facts, new discoveries and scientific theories that make this publication exciting for a wide range of readers. Appletons' Popular Science Monthly is a source of useful and exciting information for anyone interested in science and discovery.