49 1) 



NATURE 



[January 2, 191, 



allow them to be seen, as dots, under a magnification 

 of more than 3000. The colour correction leaves little 

 to be desired, Carpenter's deal test has been 

 applied, but no more than a very feeble trace 

 of colour has been seen in any of the rings. 

 This lens will be a valuable addition to a battery of 

 objectives, and when its actual magnification is taken 

 into account accurate statements of the actual power 

 used, can be made. 



VRIZE AWARDS OF THE PARIS ACADEMY 

 OF SCIENCES. 



THE president of the Paris Academy of Sciences 

 has announced the prizes awarded for the year 

 1912 as follows : — 



Geometry.— Grand prize of the mathematical 

 sciences divided between Pierre Boutroux (3000 francs), 

 Jean Chazy (2000 francs), and Ren6 Gamier (2000 

 francs) ; the Francoeur prize to Emile Lemoine, for 

 the whole of his mathematical works ; the Poncelet 

 prize to Edmond Maillet. 



Mechanics.— The Montyon prize to Ad. Doutre, for 

 his inventions in connection with the stability of aero- 

 planes ; the Fourneyron prize between G. Eiffel (1000 

 francs), for his experiments on the resistance of the 

 air, and Armand de Gramont (700 francs), for his 

 books on aerodynamics ; the Boileau prize to A. Lafay, 

 for his experimental studies on various problems con- 

 cerning the action of the wind on solid bodies. 



Navigation. — The extraordinary prize for the Navy 

 between M. Le Page (2000 francs), Captain Ronarch 

 (2000 francs), and AI. Marbec (2000 francs) ; the Plumey 

 prize between Victor Gamier (2000 francs), for his 

 invention of a periscope for use in submarine naviga- 

 tion, and Henri Fabre (2000 francs), for his studies on 

 the hydroaeroplane. 



Astronomv. — The Lalande prize between H. Kobold 

 and C. W. Wirtz, for their work on the determination 

 of the motion of nebulae; the Valz prize to A. Schau- 

 masse, for his observations on comets ; the Janssen 

 medal (astronomy) to M. Perot, for the application of 

 interference methods to the study of the solar spec- 

 trum ; the Pierre Guzman prize was not awarded. 



Geography.— The Tchihatchef prize to the Duke of 

 the Abruzzi,' for the results obtained in his expedition 

 to the Himalayas; the Binoux prize to M. Fichot, for 

 his geodesic researches ; the Delalande-Gui^rineau prize 

 to Captain Tilho, for his geographical work in Central 

 Africa; the Gay prize was not awarded, but Lieut.- 

 Col. Delaunev receives an honourable mention. 



Physics.— The Hebert prize to M. Houllevigue, for 

 his researches in magnetism and thermoelectricity ; the 

 Hughes prizes to Arnaud de Gramont, for his spectro- 

 scopic work; the La Caze prize to Marcel Brillouin, 

 for the whole- of his researches in physics. 



Chemistry.— The Jecker prize to M. Bourquelot, for 

 his work on the chemistry of plants and plant fer- 

 ments ; the Montyon prize (unhealthy trades) to^ Paul 

 Adam, for his work on the reduction of nuisance in the 

 manufacture of superphosphate and his improvements 

 in the storage of petrol and other dangerously in- 

 flammable liquids; the Cahours prize between Mme. 

 Ramart-Lucas, Paul Clausmann, and M. Ostwald ; 

 the La Caze prize (chemistry) to M. Urbain, for his 

 researches on the rare earths. 



Mineralogy and Geology.— The Victor Paulin prize 

 to Henri Arsandaux, for his chemical and petro- 

 graphical work on silicate rocks. 



Botany.— T^he Desmazieres prize to Elie and Ernile 

 Marchal', for their work on mosses ; the Montagne prize 

 between Mme. Paul Lemoine (1000 francs) and H. 

 Collin (soo francs); the de Colncy prize to Camille 

 Scrvettaz, for his monograph on the Eleagnaceae. 



NO. 2253, VOL. 90] 



Anatomy and Zoology. — The Da Gama Machado 

 prize to J. Duesberg, for vtork relating to spermato- 

 genesis of mammals ; the Thore prize to Antoine 

 Grouvelle, for his work on the Coleoptera ; the 

 Savigny prize to Louis German, for his researches 

 on the malacological fauna of tropical Africa. 



Medicine and Surgery. — Montyon prizes (2500 francs 

 each) to V. Pachon, for his memoirs relating to the 

 measurement of arterial pressure in man, Charles 

 NicoUe, for his work on exanthematic typhoid, and 

 O. Josu6, for his researches on arterio-sclerosis ; men- 

 tions (1500 francs each) are accorded to H. Carr6, 

 M. Mathis and M. Leger, and Etienne Ginestous; cita- 

 tions are accorded to Jean Troisier, Henri Claude and 

 Stephen Chauvet, Albert S^zary, A. Magitot, Louis 

 Renon, Noel Fiessinger, Georges Schreiber ; the 

 Barbier prize to Eugene L^ger, for his pharmaco- 

 logical researches ; the Breant prize was not awarded, 

 but the arrears of interest were divided between C. J. 

 Finlay (2500 francs) and A. Agramonte (2500 francs), 

 for their work on the relation of mosquitoes to the 

 propagation of yellow fever ; the Godard prize to 

 Jacques Parispt, for his work on the functions of the 

 kidney and the suprarenal capsules ; the Baron Larrey 

 prize to Dr. Troussaint, for his memoir on the direc- 

 tion of the sanitary service in war, very honourable 

 mentions being accorded to Ch. Teissier, M. Talon, 

 R. Pigache and M. Worms, A. Conor ; the Bellion prize 

 to Mme. Banda-Legrain, for her work against 

 alcoholism, J. Cavaill^ receiving an honourable men- 

 tion ; the Mege prize is not awarded, the arrears of 

 interest being given to Mme. Long-Landry, for her 

 researches on Little's disease. 



Physiology. — A Montyon prize (experimental physio- 

 logy) to Paul Portier, for his studies on the digestive 

 zymases, very lionourable mentions being accorded to 

 Max Kollmann, Theodore Rosset, and Jules Glover; 

 the Philipeaux prize divided between E. F. Terroine 

 and Marcel Lisbonne; the La Caze prize (physiology) 

 to E. Wertheimer, for the whole of his work in 

 physiology ; the Martin-Damourette prize to Maurice 

 .'\rthus, for his researches on the physiology of snake 

 poisons ; the Lallemand prize between Gabriel Petit 

 and L6on Marchand, for their memoir on the com- 

 parative pathology of the nervous system, and 

 Giuseppe Sterzi, for his work on the nervous system 

 of the vertebrates; the Pourat prize to F. Maignon, 

 for his experiments on the function of albumen as 

 a food. 



Statistics. — .\ Montyon prize (statistics) between 

 Henri Auterbe (Soo francs), Louis de Goy (600 francs), 

 M. Janselme and M. Barr^ (300 francs), and Broquin 

 Lacombe (300 francs). 



History of the Sciences. — The Binoux prize to J. L. 

 Heiberg, for his works on the history of 

 mathematics; an additional prize (1000 francs) to 

 Marcel Landrieux, for his book on the life and work 

 of Lamarck. 



General Prizes. — The Arago medal to Prince Roland 

 Bonaparte; Berthelot medals to M. Bourquelot, Paul 

 Adam, M. Clausmann, M^. Ostwald, and Mme. 

 Ramart-Lucas; the Gegner prize (400 francs) to J. H. 

 Fabre ; the Lannelongue prize between Mme. Cusco 

 and Mme. Riick ; the'Gustave Roux prize to Armand 

 Billard; the Tr(?mont prize to Charles Fr(5mont ; the 

 Wilde prize to M. Ferris, for his work in the develop- 

 ment of wireless telegraphy; the Lonchampt prize 

 between M. Grimbert (2000 francs), M. Bagros (1000 

 francs), and Jules Wolff (1000 francs); the Saintour 

 prize to Maurice Langeron (with 2000 francs), and a 

 mention (with tooo 'francs) to Will Darvill^; the 

 Bordon prize is not awarded, but R. Robinson receives 

 an encouragement (2000 francs) ; the Houllevigue 

 prize between Henri Lebesgue (3000 francs) and M. 



