Bern Rigi Zugspitze 
Fig. 4 Topography of the warm front surface. 
Fic. 4. 
Fripay, 3° Decemoer, 1920, 0700 GMT. 
| Fig5. CHART SHOWING A DEPRESSION WITH 
i 
WELL MARKED WARM AND _ COLD 
| SECTORS. 
Fia. 5. 
