The book "Appletons' Popular Scientific Monthly, December 1898. Volume LIV, No. 2, December 1898" is a publication containing interesting scientific articles and materials from various fields of knowledge. In this issue, readers will be able to find information about the current state of development of science and technology at the beginning of the end of the 19th century, as well as reviews of the latest discoveries and achievements in the world of science. A large number of illustrations and tables will help to better understand the presented materials. The authorship of the articles in this issue belongs to different authors, which makes the publication diverse and interesting for a wide range of readers who value science and its achievements.