386 
Year. I, TI. BOK IV. 
1840 +006 | —0”30 | +043 —0"19 
1841 + 0:04 — 0°01 + 0°33 — 0°35 
1842 +071 — 0°27 + 0°25 -— 0°70 
1843 + 0°65 — 0:48 + 0:29 — 0°45 
1844 + 0°47 -— 0:12 + 0:43 — 0°78 
1845 + 0°32 — 0°48 + 0°68 — 0°54 
1846 + 0°38 — 0°14 + 0°60 — 0°84 
1847 + 1:12 — 0:29 — 0°62 — 0°22 
1848 +114 —049 | 40°24 — 088 
1849 + 0°59 — 0°44 + 0°66 -— 0°81 
1850 | +059 | —0°91 | +029 | +004 
Means | + 055 | — 0:36 | + 0°33 | — 0’52 
‘* These results leave no doubt of the existence ofa lunar 
period. In fact, there are but two instances, out of forty-four, 
in which the rule announced does not hold. The mean differ- 
ence of the first and second quarters is 0°91, and that of the 
third and fourth 085. 
‘¢ It has been stated, that the law of the variation is not ex- 
hibited distinctly, from day to day, in the separate years. 
But when we combine the results of the eleven years, we ob- 
tain a series of numbers, in which the law of the change from 
day to day is evident. The following are the results: 
Day.| Range. || Day.| Range. | Day.| Range. ||Day.| Range. 
9°78 7| 9°66 15 9’59 || 22 | 8-79 
10°27 8 8-91 16 10:07 || 23 | 9:02 
10°15 9 8-94 17 9:94 || 24 | 9:16 
10°77 10 8:87 18 10-23 || 25 9°14 
10°27 || 9:12 19 10°10 || 26 8°83 
10°24 12 8:92 20 10:00 || 27 | 9:38 
9°55 13 9°33 21 9°52 || 28 | 9-60 
14 | 10:14 29}. 871 
Aaron © 
We see here, as before, that the range is greatest in the first 
and third quarters, and least in the second and fourth. The 
