444 Scientific Intelligence. 
6. Observations respecting the Periodic Meteors of August; by 
Axex. C. Twiyine. 
n every occurrence of the August meteors, which I have notiged 
with critical attention, my observations have been directed especially to 
the position of the “ Radiant.” Of the conclusions arrived at there are 
two of special interest :-— 
ae 4 ; The position ef the radiant is probably capable of a far more 
exact determination than is ordinarily supposed, or than could have been 
anticipated. 
Second; The radiant is apparently subject to a motion of several de- 
grees from day to day, and one which exhibits some remarkable points 
of agreement in the comparison of one year's positions with those of 
other years. 
The accompanying fragmentary plane chart will illustrate these com 
clusions in detail. Upon it are projectéd lines of declination and right 
into distinct series, the eye will at once discern the correspondence, 
want of correspondence, in the position and motions of the several pie 
It should be observed that the positions were determined in po 
localities in different years. The observations of 1855 were made at Ne 
Haven, those of 1858 at Cleveland, Ohio; that of 1859 at Boston, ant 
Whether this variation of locali- 
j me as they 
: : i i relative velo- 
of day will affect the radiant positions unless the primary S aevialiot 
date 18 
have 
10th, 
—mere frequently the latter than the former. 
