British Association Report, Bourne mo ath, 1919.] 



Sheatlis contaiii- 



ing barometer 



tulip s 



Camera liox sup- 

 ported on central 

 gimlials and carry- 

 ing the four baro- 

 meters 



Barometer cis- 

 terns contained in 

 Dewar flasks 



CIoca for dri\ing 

 film 



Camera box show- 

 ing side film I ox 

 open 



5Iain gimbals sup- 

 porting camera 

 box 



Fig. 1. 

 General View of Hecker's Apparatus. 



Illustrating the Report on % 



