SUMMARY BY DATES OF NUMBER OF SPOTS OBSERVED 
This summary was extracted from the fourteen observ¬ 
ing books of Dr. Peters, each of which contained such a 
list of the numbers of spots observed. A resume up to 
August 17, 1863, was published in his article in Astro- 
nontische Nachrichten, 64, 213-218, -1865, with the fol¬ 
lowing words of description (translated): 
“The following table contains for each observing day 
the number of spots of which the co-ordinates were deter¬ 
mined as stated. To these are also added the days on 
which variable weather permitted the spots to be sketched 
only and not to be measured. For these, the numbers 
signify merely countings from the sketches, and they are 
therefore enclosed in parentheses. The observations were 
interrupted in August, 1863, by a long trip to Europe, 
and were not begun again until the beginning of Novem¬ 
ber of last year. The resume may, therefore, embrace 
for now only the first series. Inasmuch as some time will 
be required for the complete publication I shall be ready, 
upon request, to communicate the details for separate 
days by letter.” 
Date 
No, of 
Spots 
Date 
No. of 
Spots 
Date 
No. of 
Spots 
Date 
No. of 
Spots 
Date 
No. of 
Spots 
i860 
July 31 
22 
Oct. 31 
22 
Feb. 28 
28 
May 8 
( 7 ) 
May 23 
15 
Aug. 1 
26 
Nov. 2 
(20) 
March 4 
29 
9 
6 
24 
l6 
3 
24 
4 
24 
7 
20 
12 
4 
2 5 
1 7 
5 
2 7 
5 
27 
11 
15 
14 
9 
28 
(17) 
6 
24 
7 
25 
14 
( 13 ) 
i 5 
6 
29 
16 
11 
3 ° 
8 
27 
15 
1 3 
I 9 
11 
June 3 
X 7 
i 5 
19 
16 
X 9 
16 
21 
21 
11 
4 
■ 1 3 
16 
13 
22 
13 
18 
9 
23 
14 
5 
1 7 
i 7 
14 
24 
15 
19 
16 
25 
13 
6 
17 
18 
16 
25 
l6 
20 
19 
3 ° 
18 
11 
11 
19 
16 
27 
(l6) 
22 
18 
3 1 
22 
12 
15 
20 
19 
28 
l8 
23 
23 
June 1 
18 
x 3 
18 
Sept. 15 
i 7 
Dec. 8 
( 24 ) 
25 
16 
5 
22 
14 
12 
17 
20 
x 3 
(l 4 ) 
28 
3 6 
7 
23 
x 5 
14 
18 
17 
14 
13 
29 
(40) 
9 
9 
16 
i 5 
20 
20 
*5 
IO 
3 i 
49 
10 
8 
17 
16 
22 
17 
23 
22 
April 4 
38 
12 
10 
18 
13 
2 3 
i 7 
5 
34 
x 3 
10 
x 9 
16 
24 
x 9 
1861 
6 
25 
I 7 
29 
20 
21 
2 5 
2 7 
Jan. 2 
l6 
7 
X 9 
18 
42 
2 7 
40 
26 
2 7 
4 
15 
8 
19 
20 
34 
28 
41 
28 
x 9 
5 
14 
9 
x 9 
22 
28 
2 9 
( 22 ) 
30 
i 7 
12 
8 
10 
T 5 
24 
I 7 
30 
34 
Oct. 6 
22 
22 
i 7 
11 
10 
25 
18 
July 4 
2 7 
7 
18 
23 
12 
18 
(18) 
27 
14 
6 
2 9 
10 
13 
25 
18 
*9 
16 
29 
12 
7 
21 
12 
18 
27 
16 
21 
x 9 
July 1 
x 3 
8 
15 
15 
20 
Feb. 1 
11 
22 
19 
3 
20 
9 
15 
16 
17 
3 
(2) 
23 
22 
5 
T 9 
11 
16 
18 
18 
6 
11 
25 
24 
7 
x 3 
15 
12 
19 
17 
12 
26 
26 
3 ° 
9 
i 5 
18 
20 
22 
(10) 
14 
14 
27 
3 1 
11 
18 
20 
20 
2 3 
( 9 ) 
16 
33 
29 
23 
1 7 
I 5 
22 
2 7 
24 
11 
22 
29 
May 2 
21 
z 9 
10 
24 
2 7 
2 5 
14 
25 
23 
4 
23 
21 
11 
28 
2 7 
2 7 
8 
26 
23 
5 
22 
23 
21 
3 ° 
3 1 
3 ° 
12 
27 
23 
7 
x 3 
25 
x 7 
