290 
EASTMAN. 
“ It seems probable that a ring of meteor asteroids exists 
within the orbit of Titan, Saturn’s largest satellite, and 
causes the annual motion of the apsides of Titan, found by 
Bessel to be 30' 28". 
“ Saturn’s rings are probably composed of an indefinite 
number of extremely minute asteroids or meteorites. 
“ The gaps in the distribution of the mean distances of the 
asteroids between Mars and Jupiter are analogous to the 
gaps in Saturn’s rings.” 
In May, 1867, Prof. Daniel Kirkwood published a book 1 
under the title “ Meteoric Astronomy,” designed by the 
author to present in a popular form the principal results of 
observation and study in that branch of Astronomy. It 
was devoted chiefly to the collection of some of the princi¬ 
pal theories and the more important observations, and to pre¬ 
senting them in a brief but popular form without attempt¬ 
ing to set forth any new theory. 
A paper by Prof. IP. A. Newton 2 in 1867, “ On certain re¬ 
cent foreign contributions to Astro-meteorology,” was devoted 
to the discussion of a table comparing the epochs and posi¬ 
tions of radiant points of shooting-stars concluded inde¬ 
pendently by R. P. Greg and Dr. E. Heis; the influence of the 
August and November meteors on the temperature of the 
atmosphere; the paths and probable origin of the shooting- 
stars, by Schiaparelli, and the age of the November group 
of shooting-stars. 
From the data obtained from the observations of the No¬ 
vember meteors in 1867 Prof. H. A. Newton 3 discussed the 
geographical limits of the shower; the personal equation of 
observers; the form of the curve of intensity; the breadth 
of the radiant in latitude; the length of the radiant in longi¬ 
tude, and the distribution in longitude of the perihelia of 
the orbits of the meteors. 
1 J. B. Lippincott & Co., Phila., 18G7, 129 pp. 
2 A. J. S., XLIII 2 , 285. 
3 A. J. S., XLV 2 , 89. 
