The book "Scientific American Popular Science Supplement, No. 620, November 19, 1887" is a collection of scientific articles that were published in the November 1887 issue of Scientific American. This publication dealt with the current scientific discoveries of the time, including new inventions, information on technical advances, and reviews of scientific research in various fields of knowledge. The authors of these articles were various scientists and experts from various fields of science. This book is a valuable source of information about the development of science and technology in the late 19th century and reflects the interest in scientific discoveries and achievements of that period. "Scientific American Supplement, No. 620, November 19, 1887" helps the reader better understand and appreciate the contribution of science to the development of society and emphasizes the importance of scientific knowledge and research.