This fascinating text contains a supplementary summary of new X-ray structure determinations published during the four years prior to the original publication of this text. As such, it follows strictly the form used in Part II of the second addition of "The Structure of Crystals" and aims to include all new studies that lead at least to cell dimensions. This book is a great addition to any collection of antiquarian texts pertaining to the taxonomy of crystals, and is not to be missed by serious students of the field. Chapters contained herein include: Structures of Elements, Structures of the Type RX, Structures of the Type RX2, Structures of the Type R2X3, Structures of the Type Rx(MX3)y, Structures of the Type Rx(MX4)y, Structures of the Type Rx(MX6)y, et cetera. Originally published in 1935, this scarce text is proudly republished here complete with a new introduction to the subject.