UPPER CUIDE 

 PULLEYS 



LOWERS 

 CUIDE 

 PULLEYS 



FLOAT 



PEN 



x—w 



RECORDING 

 DRUM 



CLOCK 

 CEAR 



BUOYANCY 

 CHAMBER 



s=> 



PAPER 

 DRUM 



AIR INLET 



3 THERMOMETER 



¥ 

 BY-PASS 



Fig. 1 — Diagram of the Autographic Air-flow Recorder. 



