Theory of X-Ray Diffraction in Crystals

A classie work, so thoroughly revised as to be essentially a new book. The changes include: a new mineral classification; a new elastic series of classification numbers for species; new data derived from x-ray crystallography, and a new form of presentation of crystallographic data; revision of specific gravities, based on new observations; introduction of the optical characters of the opaque minerals; a new chemical treatment of species; a new method of treating a series of minerals as if it were a single-species description; expansion of the annotation and reference section. Ready in June. Seventh Edition, Volume I: Approx. 803 pages; 6 by 9; Probable price, $8.50