126 AIR MASS ANALYSIS 
Winter Cyclone with Dust Storm 
(From: Parkinson, BULLETIN, May, 1936, p. 130-1) 
Fic. 1. WEATHER MaAp, 8 A.M (75TH MERID. TIME) JANUARY 16, 1935. 
(Solid lines=cold fronts, dashed lines=warm fronts, dotted lines=occluded 
fronts, stippling=duststorm areas.) 
Fic. 2. WEATHER MaAp, 12 Noon, JANUARY 16, 1935. 
