Physics. 307 
of the University of Pennsylvania on behalf of the citizens of 
Philadelphia. After the address the Academy of Music was 
Pennsylvania, by the Women’s Medical College, by the Zoo- 
. . Muybridge’s instantaneous pho- 
tographic work, and by the Botanical section of the Academy 
of Natural Sciences. 
The excursions, moreover, were on an exceedingly liberal scale. 
The Pennsylvania railroad gave three excursions to the seashore, 
viz: to Long Branch, to Cape May and to Atlantic City. The 
_ Srganized to inspect the local geology and the local botany of 
Philadelphia. 
The city of William Penn has fully sustained the reputation for 
bounteous hospitality which it acquired a century ago 8 
£ver since maintained. Unfortunately the heat during the meet- 
2 , and made a burden of many a pleasure. But in 
Spite of the high temperature, the second meeting of the Amer- 
lan Association at Philadelphia will ever remain a bright and 
pleasant memory. G. F. B. 
— 
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dry plates obtained from the manufacturers for 
—Tuirp Series, Vou. XXVIII, No. 166.—Oor., 1884. : 
