FRAGMENTS OE SCIENCE 



FOR 



UNSCIENTIFIC PEOPLE: 



A SERIES OF DETACHED ESSAYS, LECTURES, 

 AND REVIEWS. 



BY 



JOHN TYNDALL, LL. D., F. R. S., 



AUTHOR OF &quot;HEAT AS A &quot;&quot;* IF rnrtir&quot; &quot;T rrrrn ON SOUND,&quot; ETC., ETC. 



NEwTORK : 



D. APPLETON AND COMPANY, 



549 & 551 BROADWAY. 



1871. 



