FKAGMENTS OF 



SCIENCE 



A SERIES OF DETACHED 



ESSAYS, ADDKESSES, AND EEYIEWS 



BY 



JOHN TYNDALL, F.R.S. 



AUTHOR OF NEW FRAGMENTS, HEAT AS A MODE OF MOTION, 



ON SOUND, RADIANT HEAT, ON FORMS OF WATER, 



HOURS OF EXERCISE IN THE ALPS, ETC. 



VOL. II 



NEW YORK 

 D. APPLETON AND COMPANY 



1897 



