periodischer Naturerscheinungen. 67 
Ferner : I-+X1— V— VII= 0.768; 1X — IV — VII= 0.437 
log 0.768 = 9.885361 log 0.437 = 9.640481 
log cos 30° = 9.937531 log cos 60°—= 9.698970 
9.822892 . 9.349451 
0.768 cos 30° = 0.665108 
0.437 cos 60° = 0.218500 
0 — VI = 0.457000 
6a, = 1.340608 
14V — VI— XI= 0.074; 1 + IV — VIT— X = 0.046 
log 0.074 = 8.869232 log 0.046 — 8.662758 
log sin 30° = 9.698970 log sin 60° = 9.937531 
8.568202 8.600289 
0.074 .sin 30°’ = 0.037000 
0.046 .sin 60° = 0.039837 
IT — IX = 0.008000 
65, = 0.084837. 
IH V-VE+X —D-W-VU—-X=—0.144 
II VO+ VI IV —-V—X — X=+0.031 
log — 0.144 = 9.158362, log 0.031 = 8.491362 
log cos 60° = 9.698970 log sin 60° — 9. 937531 
8.857332, log 65, = 8.428893 
— 0.144 cos 60° = — 0.072 
0+V1—- I—-IX = — 0.135 R 
6a, = — 0.207. 
Berechnen wir nun die Grössen 9,, ®’, P3; ©”, so haben wir 
log 6a, = 0.127301 log 6a, = 9. 315970, 
log 65, = 8.928585 log 65, = 8. 428893 
log tang vo’ = 1. 198716 log tang ev’ = 0.887077, 
v = 862% hr ve" = RI 231 
log sin 0 = 9.999132 log sin v0” = 9.996378, 
log cos v’ = 8.800416 log cos ce” = 9.109301 
log 69, = 0 .. 128169 log 69, — 9.319592 
log 6 = 0.778151 log 6 = 0.778151 
log p, = 9.350018 log p, = 8.541441 
Bezeichnet man demnach die dem Monate mit dem Index = entsprechende Schwankung des Luft- 
druckes mit y,, so hat man 
y—=0"7717+49.350018 sin [30% + 86°22' 7] 
—+8.541441 sin [60°= + 27723’ #]. 
9% 
