1887.] MICROSCOPICAL JOURNAL. 175 
EDITORIAL. 
Meeting of the American Association.—The thirty-sixth annual meet- 
ing of the American Association for the Advancement of Science was held at 
Columbia College, New York city. The meeting was one of the largest ever 
held, and a very large number of the best scientific men in this country were 
in attendance. Professor S. P. Langley, of the Smithsonian Institution, was 
the presiding officer, and Prof. E. S. Morse, of Salem, Mass., the retiring 
president. The address of Professor Morse was a résumé of the contribu- 
tions of American investigators, more particularly in biological science, to 
the accumulated evidence in favor of Darwin’s theory of the Evolution of 
Species from pre-existent forms. The address was an interesting one, show- 
ing that, during the past ten or twenty years, while students abroad have 
been so active, Americans have not been idle, but have contributed very many 
and important facts to the great sum of evidence in favor. 
The usual interest was manifested by the members in the meetings in the 
various sections, but the meetings failed to attract as much attention from the 
citizens of New York as many members expected them to do. This is per- 
haps to be explained rather upon the ground of the absence from the city of 
many who would otherwise have attended rather than to any lack of cordialty 
on the part of the citizens, who were, in a sense, the hosts of the Association. 
Perhaps the most interesting paper brought before the Association was the 
lecture by Prof. G. N. Drummond, the African traveller, who gave an account 
of his expedition into the interior to the seat of the Livingstone mission. Ex- 
cursions about New York harbor and to Long Branch and West Point and 
Bergen Hill, besides others by the Botanical and Entomological Clubs, were 
taken with great enjoyment. The meeting was one of the largest which has 
ever been held. It was voted to hold the next meeting at Cleveland, Ohio. 
O—_—- 
Change of‘address.—We desire to call the attention of all those inter- 
ested to the change of residence of the Editor from Lafayette, Indiana, to 
Hamline, Minnesota. All communications directed to the latter address will 
receive prompt attention. 
CORRESPONDENCE. 
A Correction. 
TO THE EDITOR :—Owing to some mistake, the latter part of the description of the 
regulating thermometer, in my article ‘An Electrical Constant-Temperature Appara- 
tus,’ which appeared in the July number of your Journal, was not clear. After 
describing the regulating thermometer, made from a glass tube and small vial, and 
filled with 95% alcohol and mercury, which will keep the temperature to within one-half 
a degree, it was intended to say that a simpler one, which will keep the temperature 
to within two degrees, can be made by simply blowing a bulb on a glass tube and 
filling the bulb and a portion of the tube with mercury alone. 
We G BoRDEN, My Dy Us; Sy Ay 
Fort Douctas, UrAn, August 8, 1887. 
o——- 
To THE EpITOR:—A gentleman interested in microscopy lately called my attention 
to an item in the report of the Microscopical Society of Washington, D. C., in the 
April number of the American Monthly Microscopical Journal, page 77. ‘ Dr. Schaeffer 
asked if any of the society had seen Fasoldt’s ruling on glass. Prof. Seaman said 
Fasoldt had done some fine work, but the finest was that done by Prof. Rogers,’ &c. 
I was not aware that I was recognized as an amateur in mechanics, and that I im- 
