36 CVS CmAR iin: 
Table 18. Moments of the first order of the rectangular 
equatorial coordinates. 
7s | md FT 
| [x] | [y] [2] 
— | - | 
Bo 1707.39 | + 2382.71 = 5981.16. 
Bi "930$ + 420.20 | = 817.08 
Bs | + 164.92 | +10232%4 | — 71.48 
Bs — 1456.18 | + 2306.34 | — 3420,54 
Bist al) Ted er Eee | — 1695.87 
Sum. | — 3329.41 | + 6964.80 | - 11286.13 
In like manner we get the moments of the second order of the 
rectangular equatorial eoordinates through multiplying, for each sub- 
class, the values in table 11 by R?. We thus get 
Table 14. Moments of the second order of the rectangular 
coordinates. 
DNE MS E TT 
| [xx ey) | Le ly y] [ye] | [2771 
| | | 
| 
Bo | + 153834 | — 31431 | + 173473 | + 510904 | + 27392 | + 454857 
Bi | + 28832 | + 9919 | + 46598 | + 116469 | + 9143 | + 108914 
Be | + 46060 | — 20428 | + 61762 | + 130167 | — 36498 | + 111829 
Bs | + 86284 | — 32474 | + 119276 | + 223160 | — 68307 | + 241147 
Bs | + 51871 | — 9656 | + 47493 | + 89084 | — 16884 | + 109900 
| Sum. | + 366881 | — 84070 | + 448602 | + 1069784 | — 80154 | + 1026647 
The numbers of the last row give the moments of the second 
order for all stars of the spectral type B. Using the common nota- 
tions in mathematical statistics we may denote them by the symbols 
! 
! ! ! ! ! 
Mus, Ha. Has. Lo „ Los 4. Has. 
U 
Dividing them by the number N (= 751) of stars we obtain the 
relative moments v', about the origin (= the sun). Their values are 
the following: 
y'--- 488.2 , v'.= + 1424.48 
pS le NO 
y'-— + 597.34 , v'y = + 1367.04 . 
