Eleventh Year. 

 Vol. XXI. No. 543. 



JUNE 30, 1893. 



Single Copies, Ten Cents. 

 3.50 Per Year, in Advance. 



Contents. 



The Evolution of Consciotjsness and of the 



Cortes. C. L. Herrick 351 



Some Current Notes upon Meteorites. S. C. 



H. Bailey 352 



Biology in Our Colleges : A Plea for a 

 Broader and More Liberal Biology. 

 C. Hart Merriam 352 



Notes on Pennsylvania German Folk-Medi- 

 cine. W. J. Hoffman 355 



Notes and News ■•■ 355 



Congress of Chemists at Chicago. Harvey 



W. Wiley 356 



The Effect of Food upon the Composition of 



Butter. JFVed W. Morse . 357 



Electrical Notes. R. A. F. 357 



Letters to the Editor. 



Peculiar Nesting of a King-Bird. Wm. Ken- 

 nedy 358 



The Tucumcari Fossils. Jules Mar cou 358 



Natural and Artificial Cements in Canada. 



E. Bravendee 360 



Souni and Color. Samuel S. Wallian 360 



Age of Guano Deposits. Robert Ridgway. . . 360 



Correction. F. Bain 3i:0 



Book Reviews 360.361, 363, 363 



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