ill. 



A TSST-BOOK OF MINERALOGY. With an extended treatise oh 

 Crystallography and Physical Mineralogy. By Edward S. Dana, 

 Curator of Mineralogy, Tale College, on the plan and with the co-opera- 

 tion of Prof. James D. Dana. Illustrated with upwards of 800 wood- 

 cuts and one colored plate. Xew revised edition, 1883. 8vo, cloth. $3.50 



This work is especially designed for those who desire to make themselves 

 acquainted with the principles and methods of Crystallography, and of the no less 

 important branch of Optical Mineralogy. "With this end in view, about one-haif 

 of the whole work, which covers nearly 500 pages, is devoted to these subjects, and 

 the remainder is given to the description of mineral species. 



The system of Crystallography adopted is that of Kaumann, which has the 

 great advantage of being most readily intelligible to the beginner. The six crys- 

 talline systems are taken up in succession, and the forms occurring under each, 

 with their symbols, are described, and numerous figures are added as illustrations 

 of the text. The methods of Mathematical Crystallography are then explained, 

 and the application of them to all the ordinarily occurring cases given in full, so 

 that any one with a knowledge of ordinary trigonometry can soon learn to make 

 ah necessary calculations. This subject closes with a chapter on the measurements 

 of crystals, and others on twin crystals, the irregularities of crystals, crystalline 

 aggregates, and pseudomorphous crystals. 



Supplementary to this portion of the work, there is given in the Appendix, a 

 chapter upon Miller's System of Crystallography, in which its principles and 

 methods are clearly and concisely stated, and another upon the methods of draw- 

 ing crystals. 



In the description of the physical characters of minerals, then* distinguishing 

 optical properties are developed with especial fullness, preceded by a statement of 

 the fundamental principles of Optics upon which they depend, and a description 

 of the instruments used in the research. A colored plate in the beginning of the 

 volume shows the interference-figures observed when sections of different biaxial 

 crystals are viewed in polarized light. 



The section on Chemical Mineralogy also includes a brief description of the 

 methods of blowpipe analysis, and a table for the determination of minerals based 

 upon these is given in the Appendix. 



The descriptions of mineral species cover about 200 pages ; all species known 

 up to the date of publication are included, but only those of the most importance 

 are described at length. 



In addition to the chapters in the Appendix already alluded to, a fourth eon- 

 tains a catalogue of American localities of minerals. 



IV. 



MANUAL OP MINERALOGY AND LITHOLOGY. Containing ele- 

 ments of the science of Minerals and Rocks, for the use of the practical 

 Mineralogist and Geologist, and for instruction in Schools and Colleges. 

 By Professor James D. Dana, of Yale College. Xew edition, revised 

 and re-written. 12nio, cloth §2.00 



The prominent feature of this Manual is its arrangement of the ores under the 

 head of the metals they yield. It is thus especially adapted to the wants of those 

 interested practically in minerals, and also of Mineralogists not versed in chemistry. 

 The work contains an account of the elements of Crystallography, and of the 

 physical and chemical departments of Mineralogy ; descriptions of mineral species, 

 but with only brief notices of the less important kinds; a full table of American 

 localities of minerals ; and a table for the determination of minerals. The subject 

 of Bocks is treated with considerable detail, all the kinds of rocks with their 

 prominent varieties being described, and the principles of the Science of I£ttiQ~t&S 

 simply though briefly explained ana Uiustra:. . 



