88 
PROFESSOR A. SCHUSTER ON THE PERIODICITIES OF SUNSPOTS. 
Period in years. 
Amplitude (mean 
daily areas). 
Ratios of Amplitudes. 
Dates of maxima. 
11-12 
586 
1 
1905 -35 ±11-12 xn 
lx 11-12 
142 
0-242 
1903-75±Jxll-12x» 
lx 11-12 
64 
0-109 
1902-35±£x 11-12x71 
\x 11-12 
50 
0-085 
1904-66 ±£x 11-12 xn 
