Nebelzuschlag 
JOHANNES GRUNOW 
(n, Dreyling 
Nebelbereitschaft bel SW-W-NW-Winden 
1000 ae 
1200 1300 1400 m 
Seehéhe 
Fie. 3—Dependence of the excess of fog deposit on height above sea level 
and continentality 
2 Suan one 718'S910 
1520 
30 4050 #* % 
20 420 
3747 
110 
12.10. e 
10.55 A 
Fria. 4—Types of the cloud droplet spectrum in dependence on the origin 
of the depositing air mass 
subtropical zones are in action, if a zonal circula- 
tion is predominant. The deposits are moderate 
or scanty, if the air masses originate in polar or 
arctic zones. This variable affects the value of 
W, the water content, of our formula. 
Record of cloud-droplet spectrum—A relation- 
ship between the amount of deposit and the 
cloud-droplet spectrum was established using the 
record of the droplet spectrum of cloud air for 
different air masses. According to the method of 
Diem [1947] cloud droplets were collected be- 
tween two oil layers of different viscosity, the 
