496 Scientific Intelligence. 
4, Astronomical and Meteorological Observations made du- 
riny the year 1875 if the United States Naval Observatory, Kear 
Admiral ©. H. Davis, U. 8. N., Superintendent. Published by 
ea of the Bom: “Beoretary: of the Navy. 4to. Washington, 
the 
Obse areatony in 1875, which cover 560 pages of the volume, it 
a 
> 
ork undert chee by Professor Newcomb has as its object the 
Guvestigation of the subject of the Moon’s motion, with a view 
to ascertaining the cause of the deviations of the observations 
from Hansen’s Tables. The part of the work now published con- 
tains a reduction and discussions of observations of the moon 
before 1750, involving the use of much material hitherto but 
little known. The re emaining part, not yet completed, will con- 
tain a computation of the action of the planets and the deduction 
of the mathematical theory of the inequalities of long period in 
the moon’s mean motion. 
5. On the Spectrum of Brorsen’s Comet; by W. H. M. Creneree, 
—With reference to "Prof essor ©, A. Young’s Note on the Spectrum 
alco ol taken in a vacuum tube. The less 
s could be determined with the corresponding edge of the green 
carbon-band at oe but the: comet-band was cal much wider 
13-inch equatoreal. From vations of the catia 
compound, printed in the Bu, Be of Lelie Oreste 1875, 
it yy gree that the bands in the spectrum of alcohol are id dentical 
those in the spectra of olefiant gas, and of carbon monoxide 
and dioxide. 
A second band was seen in the orange of the comet’s spectrum 
reeaese? coincident with the carbon band about 5 3600, 
