POPULAR LECTURES 



ON 



SCIENTIFIC SUBJECTS 



BY 



SIR JOHN F. W. HERSCHEL, BART., K.H. 



M.A. ; D.C.L. ; F.R.S. L. AND E. ; HON. M.R.I.A. ; F.R.A.S. ; M.C.U.P.S. 



MEMBER OF THE INSTITUTE .OF FRANCE J AND 



CORRESPONDENT, ASSOCIATE, HONORARY OR ORDINARY MEMBER OF VARIOUS OTHER 

 ACADEMIES AND INSTITUTIONS. 



NEW EDITION. 



LONDON 

 W. H. ALLEN & Co. LTD., 13, WATERLOO PLACE, 



1895. 



