396 i Scientific Intelligence. 



of Technology, Boston, Mass. Prof. Dr. David Hilbert of Got- 

 tingeD, Sir James Dewar, of London, Prof. A. R. Forsythe, of 

 Cambridge, and Prof. John C. Kapteyn, of Groningen, were 

 elected foreign associates. The next meeting of the Academy will 

 be held at Columbia University, New York City, on Nov. 19. 

 The following is a list of the papers presented at the meeting : 



W. T. Swingle and Lyman J. Briggs : Utilization of ultra violet rays in 

 microscopy, and demonstration of the apparatus employed. 



Karl F. Kellerman : On the purification of the Isthmian potable water 

 supply. 



J. W. Gidley : A new horned rodent from the Miocene of Kansas. 



F. H. Knowlton : The Laramie problem. 



David White : Permo-Carboniferous climatic changes in South America. 



F. W, True : On the occurrence of European genera of fossil Cetacea in 

 America. 



J. M. Crafts : A new and more accurate form of normal barometer. The 

 catalysis of sulphonic acids in concentrated solutions. 



F. H. Bigelow : A solution of the vortices in the atmospheres of the earth 

 and the sun. 



L. A. Bauer : Results thus far obtained by the oceanic magnetic survey 

 of the Carnegie Institution of Washington, and their bearing. 



Richard B. Moore : The relation of radium to hot spring and geyser 

 action. 



Henry F. Osborn : Exploration in the Upper Eocene of the Fayum 

 Desert. 



Lewis Boss : Remarks on the solar motion. 



A. L. Day : Some new measurements with the gas thermometer. 



Simon Newcomb : On the optical principles involved in the interpretation 

 of the canals of Mars. Methods of detecting correlations between the varia- 

 tions of fluctuating quantities with an application to the question of the 

 variability of the Sun's radiation. 



W. W. Campbell : The D. D. Mills Expedition to the Southern Hemi- 

 sphere. 



C. D. Perrine : Results of the Intramercurial planet search. 



Alexander Agassiz : The eggs of flying fishes. The elevated reefs of 

 the Windward Islands. 



Bailey Willis : Continental structure of Asia. 



Wirt Tassin : The occurrence of elemental silicon in a meteoric iron. 



R. von Lendenfeld : Description of Zeiss' microscopic apparatus for ultra 

 violet rays as applied to the study of sponges. 



Horace L. Wells : Biogi-aphical notice of Samuel L. Penfield. 



E. W. Hilgard :' Biographical notice of Joseph Le Conte. 



2. Commemoration of the Two Hundredth Anniversary of the 

 birth of Linnmus. — The two hundredth anniversary of the birth 

 of the Swedish naturalist Linnaeus, on May 23, 1907, will be com- 

 memorated at New York City under the auspices of the New 

 York Academy of Sciences. The exercises will begin in the 

 morning at the American Museum of Natural History, with 

 addresses and an exhibition of the animals, minerals and rocks 

 first classified by Linnaeus. They continue in the afternoon at 

 the Botanical Garden and Zoological Park in Bronx Park, with 

 addresses and suitable exhibits of plants and animals and the 

 dedication of the>" Linnaean Bridge." This bridge, recently com- 

 pleted, over the Bronx river connects the Botanical Garden and 

 the Zoological Park and is to be named in honor of Linnaeus ; a 

 bronze tablet with suitable inscription will commemorate his work 



