302 J. Lovering—Mathematical and Philosophical 
] 
terly work on electricity and magnetism, which appeared in 1873, 
has built a monument to Faraday, and unconsciously to himself 
edition of his works. Maxwell objects to the formula of Gauss ¥ 
because it violates the law of the conservation of energy. Weber's : 
m as made known in 1846; but it has not escaped the crit- ‘ 
icism of Helmholtz. It represents faithfully the laws of Amp? | 
reality and not a mere ratio Of the two volumes of Mr. Max-' 
well, ga vem with the richest and heaviest cargo, the reviewer 
says: “Their author has, as it were, flown at everything: and, 
with immense spread of wing and power of beak, he has hunted 
down his victims in all quarters, and from each has extracted 
