Astronomy on MSN

What is the origin of the letters used in star classification?

What is the origin of the letters used in star classification? Why didn't astronomers use ABCD? J. HaldimanChicago, Illinois ...
Nature

The Origin of Optical Spectra

AMONG the many remarkable communications made this year to Section A (Mathematics and Physics) of the British Association, which, grouped together, will probably mark it off as an outstanding meeting, ...
Nature

(1) The Origin of Spectra (2) The Properties of Electrically Conducting Systems: Including Electrolytes and Metals (3) Glue and Gelatin (4) Catalytic Action

(1) The Origin of Spectra. By P. D. Foote F. L. Mohler. (American Chemical Society Monograph Series.) Pp. 250. (New York: The Chemical Catalog Co. Inc., 1922.) 4.50 ...