88 Miscellaneous Intelligence. 



tise lacks that charm. Many a student who uses it will be likely 

 to lose his interest in experimenting, when he finds that some 

 trifling direction has been omitted by which success could have 

 been secured. No handbook dealing with manipulation should 

 fail to give even fussy details, rather than leave the student to 

 find out all such minor points of practice for himself. 



Although we miss a good many excellent methods which should 

 find place in a work of this sort, it is nevertheless a valuable aid 

 in the laboratory. The illustrations are numerous and excellent. 

 It is to be regretted that the work has no index. G. l. g. 



III. Miscellaneous Scientific Intelligence. 



1. Proceedings of the Colorado Scientific Society, vol. ii, part 

 2, 1886, 153 pp. 8vo. Denver, Col. (published by the Society). — 

 The Colorado Society, though somewhat removed from the chief 

 scientific centers has shown an admirable spirit in the amount and 

 excellence of the scientific work it has called out. This closing 

 part of volume ii contains a series of papers chiefly geological 

 and mineralogical. Mr. P. H. Van Diest describes the telluride 

 veins of Bowlder county, with an excellent map. A paper by 

 Charles G. Slack follows on the artesian wells of Denver ; these 

 wells number about 200, furnishing about 3,000,000 gallons daily, 

 they draw their water from sandstone or shale layers, from a few 

 inches to 80 feet in thickness, at varying depths down to 900 feet. 

 Mr. S. F. Emmons furnishes notes on some Colorado ore deposits. 

 Mr. W. Cross on the Cimarron land-slide of July, 1886; Mr. R. 



C. Hills on the circulation of water through the strata of the 

 Upper Cretaceous Coal-measures of Gunnison county. There are 

 also a number of mineralogical articles, several of which have 

 been printed in this Journal. 



2. Relative Proportions of the Steam Engine, being a rational 

 and practical discussion of the dimensions of every detail of the 

 steam engine, by W. D. Marks, 3d edition, revised and enlarged. 

 295 pp. 8vo. Philadelphia, 1887 (J. B. Lippincott Company). — 

 A new and considerably enlarged edition of this excellent manual 

 will be acceptable to all interested in the steam engine. The chief 

 additions are in an important line, being an attempt on the part 

 of the author, approaching the subject both from the mathemati- 

 cal and practical side, to develop the laws of the condensation of 

 steam within the steam cylinder. 



3. Modem American Methods of Copper Smelting ; by Edw. 



D. Peters. 342 pp., large 8vo. New York, 1887. (Scientific 

 Publishing Company.) — The author gives here a practical and 

 detailed description of the methods employed in this country for 

 smelting copper, adding more than usual of minute directions and 

 with many useful data as to the actual cost. The volume will be 

 valuable to the student and still more to the practical worker. 



OBITUARY. 



Ferdinand Vandeyeer Hayden.— Dr. Hayden, for many 

 years at the head of Government Exploring Expeditions in the 

 Rocky Mountain region, and the author of various geological 

 papers, died on the 22d of December, in his 59th year. A notice 

 of his special scientific work is necessarily deferred. 



