Vc. lviii. No. «. MARCH, 1901. 



THE 



POPULAR SCIENCE 



MONTHLY. 



EDITED BY J. McKEEJV CATTELL. 



*P 



CONTENTS 



Chapters on the Stars. Professor Simon Newcomb 449 



The Law of Substance. Professor R. H. Thurston 467 



Pyramid Lake, Nevada. Dr. Harold W. Fairbanks 480 



Throwing a High Explosive from Powder Guns. Hudson Maxim... 490 



The HeigLt and Weight of the Cuban Teachers. Dr. Dudley Allen 



Sargent 502 



The Geologist Awheel. Professor William H. Hobbs 515 



The Formation of Habits in the Turtle. Robert Mearns Yerkes . . 519 



!The Science of Distances. Sir George S. Robertson 526 



A Study of British Genius. Havelock Ellis 540 



Discussion and Correspondence : 



Random Remarks of a Lady Scientist : Rebecca Shaepe. Christian Science : Pro- 

 fessor Joseph Jastrow. The Inventor of the Sewing Machine : Vindicatob 548 



Scientific Literature : 



The Foundations of Knowledge ; Stationary Radiants to Showers of Shooting Stars ; 

 The Utilization of Food and Alcohol in the Human Body 552 



The Progress of Science : 



Science in the Nineteenth Century and in the Reign of Queen Victoria ; Science 

 and the Government ; Appropriations for the Department of Agriculture ; The 

 National Museum ; The Naval Observatory ; The Inert Elements ; Bacteria and 

 Dairy Products ; The Milk of Tuberculous Cows ; Scientific Items 555 



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