( 205 ) 
the curves are very broad and during the years 92—97 almost 
invariable in breadth, then a concordance with the number of sun- 
spots appears rather dubious. 
ANNUAL VARIATION. 
It soon appeared that an annual fluctuation existed in the fre- 
quency of the disturbances. Hence I have calculated for a closer inquiry 
the twelve day and not the monthly means. (Five 13 days periods 
were made, distributed equally throughout the year.) 
Period. Ee À Period. Brat jn 
TW eek | 29 — 8 2 VIL —13 VII 21 —16 
13 » —24 » 36 — Ì 14 » —25 » 25 —12 
De eer 39 2 26» — 7 VIII 19 —18 
6 II —i7 » 57 20 8 VIIi-19 » 7 =r 
18 » —1 HI 73 36 29» == 5 32 — 5 
Zane HE 64 27 igo gael Chin cia eee eee 
15 » —26 » ol 14 13 » —24 » 35 — 2 
27 » — 7 IV 48 A 29» —6X 49 12 
8IV —19 » 41 4 fe dco Loy 63 26 
ie Pies a © Vi 35 — 2 20 » —dsl » 47 10 
2V -—I13 » 29 — 8 1 XL —12 XI 30 —7 
14 » -—26 » 30 —7 13 » —24 » 41 4 
27 » — 7 VI 16 —21 25 » — 6 XII Al d. 
8 VI —19 » 26 —ll 7 XII —I18 » 23 —14 
20 » —1 Vil 20 —17 19 » —3l » 28 — 9 
Mean 37 
Hence the annual variation of the Spasms is very clear, and with 
two maxima. In order to determine even more accurately the dates 
of the maxima etc., I have calculated the daily numbers for the adjacent 
months and compared them by means of the formula a + 26 +4 c. 
A principal maximum certainly appears from these on February 22, 
a second smaller maximum on October 17; a minimum on Decem- 
ber 22 (close to Dec. 20, the mean of Oct. 17 and Febr. 22) and 
a second very uncertain minimum. Here the comparison of the daily 
numbers for the period May 23—August 7 by means of the formula 
a+2b+4c+6d-+4et2ftg 
20 
