484 Scientifi-c Intelligence. 



upon Dr. Arthur Auavers of Berlin, — was unanimously voted 

 1S94, April IT, to Dr. Seth C. Chandler of Cambridge, for his 

 investigations and discoveries concerning the Variation of Lati- 

 tude, and his researches relative to Variable Stars. 



2. TJie use of Governmental Maps in School ; by Wm, M. 

 Davis, C. F. King and G. L. Collin, pp. 65 (Henry Holt & 

 Co.), 1894. — This is a handy descriptive list of some of the more 

 useiul maps of the United States, with brief directions for obtain- 

 ing them, grouped under the following heads, the geological sur- 

 vey, the Coast and Geodetic Survey, the Mississippi River Com- 

 mission, the Missouri River Commission, the Survey of the 

 Northern and Northwestern Lakes, the State Topographical Sur- 

 veys, the Weather Bureau and the Hydrographic office. Though 

 primarily designed for schools, the Report will be useful to all 

 persons interested in the geographical features of the country. 



w. 



3. National Academy of Sciences. — The following is a list of 

 the papers presented at the April meeting held at Washington, 

 April 17 to 20: 



G. L. Goodale : Histological Characteristics of Certain Alpine Plants. Corro- 

 rosions by Roots. 



George C. Comstock : An Investigation of the Aberration and Atmospheric 

 Refraction of Light, with a Modified Form of the Loewy Prism Apparatus. 



Joseph Le Conte : Biographical Memoir of John Le Conte. 



A. Agassiz : The Coral Reefs of the Bermudas. The So-called Serpulse Reefs 

 of the Bermudas. The Bathymetrical Extension of the Pelagic Fauna. 



M. Caret Lea : New Method of Determining the Relative Affinities of Certain 

 Acids. 



A. M. Mayer: On the Change of Young's Modulus of Elasticity with Varia- 

 tion of Temperature, as Determined by the Transverse Vibration of Bars of Vari- 

 ous Temperatures. On the Production of Beats and Beat-tones by the Covibra- 

 tion of two sounds, so high in pitch, that when separately sounded they are in- 

 audible. On the Motions of Resonators and Other Bodies Caused by Sound 

 Vibrations, with Experimental Illustrations; also a Reclamation. 



S. C. Chandler : On Late Researches on the Variation of Latitude. 



S. P. Langley: On the Infra-red Spectrum. The Internal Energy of the Wind. 



J. S. Billings: The Bacteria of River Water. The Influence of Light Upon 

 the Bacillus of Typhoid, and the Colon Bacillus. 



T. C. Mexdenhall: Recent Gravity Instruments and Results. 



Theo. Gill: The Geographical Distribution of Fresh-water Fishes. 



C. S. Hastings: Note on a Possible Increase in the Ultimate Defining Power 

 of the Microscope. 



Obituary. 



Samuel White Baker, the African explorer, died Jan. 20, 

 1894, at the age of 73. 



Vernon Lovett Cameron, another of the leaders of discovery 

 in Africa, died March 26, 1894, at the age of 50. 



William Pengelly, the English Archaeologist, died March 16, 

 1894, at the age of 82. 



George Pouchet, the author in 1858 of "De la pluralite des 

 races humaines," died in March, 1894, aged 61. 



Charles Edouard Brown-Sequard, the eminent French 

 physiologist, died April 1, 1894, at the age of 77. 



Joseph he Szabo, geologist and mineralogist of Buda Pest, 

 died April 10, 1894. 



