CONTENTS 

 Obiginal Papers 



Fbc« 



Physics. — An aneroid barometer. H. C. Dickinson and N, S. Osborne 337 



Physics. — ^The specific heat and heat of fusion of ice. H. C. Dickinson 



and N. S. Osborne , 338 



Physics. — Covellite: A singular case of chromatic reiBection. H. E. Mbbwin. 341 

 Geology. — ^The calculation of calcium orthosilicate in the norm of igneous 



rocks. Henby S. Washington 345 



Mineralogy. — Bornite as silver precipitant. Chase Palmer 351 



Botany. — New or imperfectly known species of bull-horn acacias. Wiluam 



Edwin Saffobd 355 



Economics. — Efficiency as a factor in organic evolution. I. Alfred J. 



LOTKA 360 



Abstracts 



Geodesy 369 



Geology 370 



Zoology .^ 370 



Proceedings 



The Biological Society 371 



The Anthropological Society 373 



