"Appletons' Mass Scientific Monthly, January 1899, Volume LIV, No. 3, is published by a collective of authors. In this issue, you will find fascinating articles that deal with various aspects of science and technology. From mathematics to physics, from astronomy to biology, each field is presented with interesting information and a primary source. With the help of this publication, you have a unique opportunity to deepen your knowledge about the world around us and hear the voices of outstanding researchers and scientists of the 19th century. Let this book open the windows to the most interesting studies of our time."