434 Scientific Intelligence. 



gratuitously to all members of the last and of the present Con- 

 gress. 



The guide book, prepared by the local comite (V organisation of 

 the Congress, forms an admirable geological description of the 

 important features of the Swiss Jura and Alps. It is a volume 

 of 306 pages entitled " Livret- guide geologique dans le Jura et 

 les Alpes de la Suisse,^ with numerous woodcuts and thirteen col- 

 ored maps, illustrating the itineraries of the eleven excursions 

 planned for the members, and was prepared by several of the 

 ablest Swiss geologists. This guide book, together with a beau- 

 tiful new geological map of Switzerland, on a scale of 1 : 500,000, 

 brings before geologists the latest detailed scientific interpreta- 

 tion of this always interesting region of the Alps. 



The next meeting of the Congress, the seventh, will be held in 

 189V at St. Petersburg. Arrangements are being made for a par- 

 ticularly interesting meeting in Russia, excursions are planned to 

 cross Russia and the Urals into Siberia, and one to the Caucasus 

 and the Caspian Sea. The Czar has expressed his interest in the 

 Congress by inviting it to meet in St. Petersburg, and by sub- 

 scribing liberally toward defraying the expenses of the Congress 

 at its Russian meeting. 



3. Chloride of mercury batteries. — Mr. D. H. Fitch of Caze- 

 novia, N. Y., wishes attention called to the fact that he made 

 use of the chlorides of mercury as the active agents in chemical 

 batteries prior to the date of Helmholtz's description cited in 

 Professor Carhart's article in this Journal.* Mr. Fitch took out 

 a United States patent for a battery constructed on this principle, 

 dated Sept. 16, 1879, the application for which was filed Sept. 9, 

 1878, entitled No. 219,631, Galvanic Batteries, Derick H. Fitch. 



Vor a Minas Geraes (Brszil), by Paul Fereand, Vol. I, pp. 159, Ouro Preto, 



1894. 

 Minnesota, Geological and Natural History Survey, Vol. III. 



The Lower Silurian Ostracoda of Minnesota, by E. O. Uleich, pp. 629-693. 



1894. 

 The Lower Silurian Trilobites of Minnesota, by John M. Claek, pp. 694- 

 759. 1894. 

 The Animal as a Machine and a Prime Motor, and the laws of Energetics. 

 by R. H. Thurston, pp. 1-97 (John Wiley & Sons). 1894. 



Congres geologiques international, Livret-guide geologique dans le Jura et 

 les Alpes de la Suisse. (Comite d'Organisation, VI Session, Zurich), pp. 1-306. 

 89 figures, i-xiii plates. 1894. 



Arkansas, Annual Report of the Geological Survey for 1892, Vol. II, The 

 Tertiary Geology of Southern Arkansas, by G. D. Haeeis, pp. 1-207. 1894. 

 Miscellaneous Reports, pp. 1-349. 1 894 : 



P. W. Simonds and T. C. Hopkins: The Geology of Benton County. 



J. C. Beanner: Elevations in the State of Arkansas. 



J. C. Beanner: Observations on erosion above Little Rock. 



J. C. Beannee: Magnetic observations. 



F. A. Sampson : The Mollusca of Arkansas. 



C. H. Bollman : The Myriopoda of Arkansas. 



Seth E. Meech : The Fishes of Arkansas. 



C. E. Siebenthal : The Geology of Dallas County. 



J. G. Brannee : Bibliography of the Geology of Arkansas. 



* A one-volt standard cell. This Journal, vol. xlvi, p. 60. 



