SKETCH OF 

 PROF. JOHN LE CONTE 



SENSITIVE FLAMES AND 

 SOUND-SHADOWS 



BY 



WALTER LE CONTE STEVENS 



PEOPESSOR OF PHYSICS IN THE PACKER COLLEGIATE INSTITDTK 



TWO ARTICLES 



HEPRmTEB FROM THE POPULAR SCIENCE MONTHLY 



FOR NOVEMBER, 1889 



NEW YOKE 

 D. APPLETON AND COMPANY 



1889 



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