This work fills a unique position in the literature. It is a concrete, middle-level treatment that devotes as much attention to methods of research and observation as it does to results. Here at last is a book in English which bridges the gap between elementary introductory accounts and advanced technical monographs. In this reliable and readable translation by an eminent American specialist in the field, you will have the best guide to observational astrophysics in the English language.
Linmiting his discussion to normal stars, the author begins with background material covering definitions and problems of measurement through the earth's atmosphere. Current methods of stellar photometry and spectroscopy are described lucidly and precisely: photographic, photoelectric, and thermal measurements; slit and slitless spectrographs; photoelectric and electronic spectrophotometry; etc. He then takes up the main results of research involving the classification and properties of normal stars, giving a general introduction to stellar spectra and their classification and an account of the Harvard scheme of star classes and spectral types.
This material prepares us for the construction of the Hertzsprung-Russell diagrams, which reveal the great families of stars and the two main types od stellar populations, and the Yerkes 2-dimensional classification. Subsequent chapters deal with continuous spectra of the stars, gradients, and color temperatures, spectrophotometric classification of two and three dimensions; diameters and effective temperatures of the stars (including the experiments of Michelson and Pease, the occulation and indirect spectrophotometric methods, principles of interferometric measurements of apparent diameters, etc.); masses and densities of stars; and a discussion of general theories about the constitution of stellar atmospheres and the evolution of stars.
The book provides a firm basis upon which the student will build all is future practical and theoretical work - the background indispensable to any advanced study of the manifold problems of astrophysics. It is also a fine book for hobbyists and others with some grounding in astronomy who want to explore these matters in greater depth than elementary texts allow.
--- excerpt from book's back cover