American Association. 303: 
the magnetic rotation of compounds in relation to their chemical 
composition,” and “On coal-tar coloring matters ;” by Dr. J. H. 
Gladstone, “On the present state of our knowledge of refraction 
equivalents ;” by Professor Frankland, ‘On the chemical aspect 
of the storage of energy ;” and by Professor Tilden, “ On some 
ion.” 
Physical Section, the subjects discussed were: “ The seat of the 
electromotive forces in the voltaic cell,” the discussion being 
opened by Professor O. J e, who took ground against the 
contact theor and “The connexion of sun-spots with terres- 
trial phenomena,” open rofessor A, S In the 
discussion “ On chemical changes in their relation to micro-organ- 
isms.” The second feature is the special reports presented to the 
sections. The Physical Section received the reports of Commit- 
tee e : . pe 
Professor Chandler Roberts ‘On spectrum analysis ;” and by Mr. 
H. B. Dixon on “ Chemical nomenclature.” : 
was the social element forgotten at the Montreal meeting. 
party of 150 was taken to-the Rocky Mountains and another of 
one. G. F. 
e American Association—The Philadelphia meetin 
i as th 
the number of members in attendance, whic 
unprecedented figure of 1249, by the number of added members, 
Sven as 491, by the number of papers pre 
on the Secretary’s list, on the one hand; or 
papers presented, on the other; the general verdict seems to 
wuanimous in placing this meeting as exceptiona 
interesting. 
he meeting opened on Thursday morning, Sept: 4th, in the 
Academy of Music, Professor Young resigning the esidency to 
