160 Scientific Intelligence. 



series on Engineering Mechanics, other parts of which have been 

 translated by Coxe, DuBois and Klein. b. 



10. An Elementary Treatise on Fourier's Series and Spherical, 

 Cylindrical and Ellipsoidal Harmonies ; by W. E. Byerly. pp. 

 287 (Ginn & Co.). Based upon Rumaun's " Partialle Differential- 

 glischungen" and designed to furnish with Pierce's treatise on 

 " The Newtonian Potential Function " a course of study for stu- 

 dents at Harvard University preparatory to modern Mathematical 

 Physics. b. 



Geological Survey of Texas. Annual Report for 1892, E. T. Dumble, State 

 Geologist. The following parts have appeared since the notice in this Journal, 

 vol. xlvi, p. 307 was written: 



Notes on the Geology of Northwestern Texas, by W. F. Cummins, pp. 177-238. 



Report on the Cretaceous Area north of the Colorado river, by J. A. Taff, S. Lev- 

 erett, Assistant, pp. 239-354, with maps and sectional diagrams. 



Report on the Colorado Coalfield of Texas, by N". F. Drake and R. A. Thompson, 

 pp. 355-481, with maps and diagrams. 



Arkansas Geological Survey, Annual Report for 1890. John C. Branner, State 

 Geologist, vol. iv. 



Marbles and other Limestones, by T. C. Hopkins. 443 pages and 6 maps sep- 

 arately bound. 



Annals of British Geology, 1892. A digest of the books and papers published 

 during the year — with occasional notes, by J. F. Blake, pp. 310, 100 illustra- 

 tions. (Dulan & Co., London, 1893.) 



Memoirs of the American Museum of Natural History, vol. i, Part 1. Republica- 

 tion of descriptions of Lower Carboniferous Crinoidea from the Hall Collection 

 now in the American Museum of Natural History, with illustrations of the origi- 

 nal type specimens not heretofore figured. By R. P. Whitfield, 4to, pp. 1-37, 

 Plates I-III. 1893. 



Economical Geology of the United States, by Ralph S. Tarr. pp. 509. 1894. 

 (Macmillan & Co.) 



Helical Gears; A practical treatise by a foreman pattern maker, pp. 127, 

 1894. (Macmillan & Co.) 



Die Yorwelt unci Hire Entwickelungsgeschichle, by Ernst Koken. pp. 654, 1893. 

 (T. O. Weigel Nachfolger (Chr. Herm. Tauchnitz).) 



Obituary. 



Rudolf Wolf, the distinguished Astronomer and for some- 

 time Director of the Zurich Observatory, died in Zurich, Nov. 6, 

 1893. 



Paul Fischer, author of Manuel de Conchyliologie et de 

 Paleontologie Conchyliologique and of numerous papers on con- 

 chological subjects, died in Paris, Dec. 29, 1893. 



D. A. Braunns, Extraordinary Professor of Geology in Halle 

 University died in 1893. 



Arthur Milnes Marshall, the brilliant Professor of Zoology 

 of Owens College, Manchester, died from the effects of an acci- 

 dent on Scawfell, Dec. 31, 1893, in the forty-second year of his 

 age. 



Pierre T. Van Benedest, Professor of Zoology, Paleontology 

 and Anatomy, Lourain, has recently died at the age of ninety- 

 three. 



Jeak Vilanova t Piera, the distinguished geologist of 

 Madrid is dead. 



