164 AIR MASS ANALYSIS 
@= 310° 
JUNE 23,1937 A.M. 
Fic. 4. ISENTROPIC CHART CONSTRUCTED FROM AEROLOGICAL OBSERVATIONS 
MADE IN THE HARLY MORNING OF JUNE 23, 1937. (The explanation of the 
construction and the legends is given after Fig. 7.) 
SAULT STE MARIE DETROIT DAYTON NASHVILLE MONTGOMERY PENSACOLA - 
300 -~ Dye 
- 
Fic. 5. VERTICAL CROSS-SECTION THROUGH THE ATMOSPHERE FROM ST. STE. 
Marig£, MICHIGAN, TO PENSACOLA, FLORIDA, ON JUNE 23, 1937, EARLY A.M. 
(The explanation of the symbols is given after Fig. 7.) 
