CIENCE 



Sixth Year. 

 Vol. XI. No. 273. 



NEW YORK. APRIL 27, if 



Single Copies, Ten Cents. 

 J3.50 Per Year, in Advance. 



Entered at New York Post-Office as Second-OIasB Mail-Matter. 



Editorial . 195 



The National Academy Meeting, and the Enthusiasm shown. 

 — Death of Dr. Cornelius R. Agnevv. 



Meeting of the National Academy of Sciences, 



The Hypothesis of Potential Energy . . . ig6 



Serpent-Mound ...... 196 



A New Aerobioscope ..... 197 



The Systematic Relation of Platypsyllus as determined by the 



Larva ....... 197 



The Orbits of Aerolites ..... 198 



Spectrum Photography and the Spectrum of Carbon . . 198 



Vertebrate Fauna of the Puerco Series . . . 198 



An Ethnographical Collection from Alaska 



Mental Science. ^^- '^s 



The Mental Powers of Insects .... 199 



The Function of the Cerebrum in the Dog . . . 200 



A Suggestion for the ' Telepathic ' Theory . . . 200 



Electrical Science. 



Cost of Electrical Distribution by Transformers and Secon- 

 dary Batteries ..... . 200 



Advantages of Electricity for Railroad-Worli . . 200 



Electric Plienomena provoked by Radiation . . . 201 



Health Matters. 



Portagiousness of Consumption 



Book-Reviews 



The Nervous System and the Mind 



Beitrage zur Geo])hysik 



The Geological History of Plants 



Yankee Girls in Zulu Land 



Irish Wonders 



A Manual of German Prefixes and Suffixes h 



Principles and Practice of Morality 



A History of Political Economy 



The Study of Politics 



A Manual of Physiology 



Education in Bavaria 



Outlines of Practical Physiology 



Manual of Pharmacy and Pharmaceutical Chemistry 



Notes and News 

 Letters to the Editor. 



Formation of the Explosive Chloride of Nitrogen by Electroly- 

 sis .... William B. Half 

 Indian Graves . . . iV. M. Beauchamp 



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