J. Lovering—Mathematical and Philosophical State, etc. 297 
VI—The Mathematical and Philosophical State of the 
hysical Sciences; by Prof. Joserpn LovErrne. 
Presidential Address of Prof. Lovering before the American 
Association at Hartford, August, 1874. 
tion to each pened the eye 
observation to see what might never have been discovered = 
9) i i that o: 
and that 
dulatory theory of light has shown a wonderful facility of adapta- 
‘ 2 i 
march and obliged to show their credentials. After Fresnel and 
Young had secured a firm foothold for Huyghens’ theory of light 
in mechanics and experiment, questions arose which have per- 
ical 
sensible difSionse in the prismatic refraction of light, whether 
tt e earth was 
nent physicists and mathematicians might be enumerated w 
have taken part in it. Fresnel’s e lanation has encountered 
