138 TRANSACTIONS OF THE [Mar. 13 
SECTION OF ASTRONOMY AND PHYSICS. 
The Section was called to order at 8:20 pv. m., Professor Rrezs 
in the chair. 
A paper was read by Mr. C. A. Posr on ‘‘ A New Driving 
Clock for Equatorials.” The apparatus described has been in 
successful operation for more thana year. It involves a new 
method of control (not electric), and a new differential slow 
motion for photographing. This slow motion can be applied in 
in either direction without stopping the clock, or changing its 
rate. | 
Mr. Jacopy communicated the results of some measures made 
by him upon Mr. Roruerrurn’s plates of @ Cygni. These 
additional measures seem to confirm the existence of a large 
parallax for this star. 
Professor Rees exhibited a photograph of a meteor trail, 
recently obtained by Mr. Joun E. Lewis, of Ansonia, Conn. 
March 13, 1898. 
Stratep Mererina. 
Mr. Cuartes F, Cox in the chair, and 72 persons present. | 
The minutes of the meeting of February 23, 1893, were read 
and approved. 
The following papers were read by title and referred to the 
Publication Committee : 
‘“‘The Myriopoda collected by the United States Eclipse 
Exploring Expedition to West Africa in 1889 and 1890,” by O. 
F. Cook and T. §, Collins. 
“Studies on the Life-History of some Bombycine Moths, 
with Notes on the Setz and Spines of certain Species,’’ by 
Alpheeus 8. Packard, 
BIOLOGICAL SECTION, 
Professor G. S. Hunrineton, in a paper on ‘‘ Anomalies 
of Pectoralis, major and minor,’’ referred to the value of those 
