48 
Let us now take the epochs of the various barometrical 
maxima and minima given by Broun, and record the state 
of the solar surface corresponding to each epoch, and also 
to the two days before and the two days after each epoch. 
This is done in the following table, in which the central 
number always corresponds to the barometric epoch, and 
in which the numbers enclosed in brackets denote interpo- 
lated sun spot values. 
Table I. — Barometric Maxima. 
Barometric epoch. 
1845. Sun Spot Areas. 
Jan. 
8 .. 
. (400) .. 
. (470) 
... 540 ., 
.. 840 . 
.. 180 
5 J 
12 ... 
180 .. 
. 72 
... 660 ., 
.. 918 ., 
.. 414 
Feb. 
7 .. 
• (0) .. 
.. 12 
... 30 . 
.. 24 . 
.. 546 
jj 
14 ... 
. (555) .. 
. 750 
...(800). 
.. (850). 
.. 900 
» 
25 ... 
894 .. 
. 1452 
... 972 . 
.. (786)., 
.. 600 
March 
7 ... 
888 .. 
. 360 
...(255)., 
.. 150 ., 
.. 330 
• 
14 ... 
(702) .. 
. 816 
... 648 . 
.. (489)., 
.. 330 
)) 
31 ... 
(0) .. 
. 210 
... 612 . 
.. 990 ., 
,. 996 
Sum. 
.. 3619 ... 
. 4142 
...4517 . 
.. 5047.. 
.4296 
Table II.- 
—Barometric Minima. 
Barometric 
epoch. 
1845. 
Sun Spot Areas. 
Jan. 
10 ... 
540 .. 
. 840 
... 180 . 
.. 72 .. 
. 660 
15 ... 
918 ... 
. 414 
... 330 . 
..(246).. 
.(162) 
5? 
31 ... 
(461) ... 
. 480 
... (360) . 
.. 240 . 
.(216) 
Feb. 
11 ... 
546 ... 
■ (^3) 
... 360 .. 
,. (555).. 
. 750 
j? 
21 ... 
930 . 
. 882 
... (886) . 
.. (890).. 
. 894 
March 
4 ... 
780 ... 
702 
... 804 . 
.. 888 .. 
. 360 
24 ... 
336 ... 
. (238) 
... (140)., 
.. 42 .. 
. 36 
April 
3 ... 
990 ... 
, 996 
... 750 ., 
.. 600 .. 
. 540 
Sum.. 
. 5501 ... 
5005 
.. 3810 .. 
. 3533 .. 
.3618 
It will be seen from these tables that barometric maxima 
appear to correspond to increasing sun spot values, while 
barometric minima appear to correspond to decreasing sun 
spot values ; the. observations are not, however, sufficiently 
extensive to render these conclusions certain. It would, I 
think, be of importance to pursue this investigation. 
