""A Treatise on Astronomical Spectroscopy"" is a comprehensive guide to the field of astronomical spectroscopy, originally published in German in 1894 as ""Die Spectralanalyse der Gestirne"". The book is authored by Julius Scheiner, a renowned German astronomer who made significant contributions to the study of the spectra of stars. The book covers a wide range of topics related to astronomical spectroscopy, including the principles of spectroscopy,...