Fig. 1 



A TWELVE THOUSAND CU. FT. SOLO BALLOON 



8:10 A.M. FEB. 12, 1921, ELEV. 500 FT. ABOVE SEA LEVEL. 

 CAMERA FACED NORTHWEST. 



This balloon had made but two previous ascensions; the present being the third 

 for the balloon and the two hundred and ninth for Ross Field. The pilot of the 

 present flight also made the first trip (as meteorologist) in June, 1919, from this Field. 

 The records of the War Department state that this was the first military spherical 

 balloon flight made on the Pacific coast. 



12 



