H. A. Newton on numbers of Shooting Stars. 195 
For seven observers we find the numbers for the seven grou 
formed by leaving out of the whole tWelve successively the 
groups of fives given above. The mean of the seven numbers 
is 152°86. 
For eight observers we form three groups by omitting suc- 
cessively from the twelve, DGPW, BEMR, and AFHT. The 
mean of the three numbers is 160-67. 
For groups of nines we omit successively BDE, GPR, FMT, 
and AHW. The mean result is 166-75. 
For groups of tens we omit in succession HT, DE, MW, AF, 
BR, and PG. The mean result is 173°5. 
or eleven observers we omit each one of the twelve in suc- 
cession. ‘The mean result is 179°88. : 
These means are given in column A of the following table. 
Column B shows how many would be seen by a number of ob- 
servers in a period during which four of them would see 1000 
meteors. It is obtained by dividing the numbers in column A 
by the decimal ‘1192 : 
A. B. Cc. 
Seen by one observer, 38°75 325 359 
“two observers, 75°40 633 651 
“ three “ 99°70 8 856 
= four ‘* 119°20 1000 1000 
* five & 131°86 1106 1136 
a sx i 143°00 1200 1249 
s seven “ 152°86 1282 
“ eight “ 16067 1348 
we 166-75 1399 
“ ten - 173°50 1451 
eleven’ “ 179°83 1509 
“« twelve “ 186°00 1560 
column C are given the results of a discussion similar to 
that just detailed, of observations made on the Sah of Aug. 
h, 1865 i 
urs, 
the intrinsic brilliancy of the shooting stars on the night of ob- 
liancy; upon the clearness, or haziness, or cloudiness of the sky; 
upon the wer and quickness of vision of the observers; and 
upon the degree of fixedness of their attention during the watch. 
€ essential agreement of the two series in columns and “s 
however, justifies confidence in them as a first approximation. 
