330 



r 





O 







- 



s o 

 o z 



K 

 H 



H 



K 



W 

 H 

 W 



s 

 o 



S 



H 



E 



H 





0-t 



OS 



FIG. 305. 

 THERMOMETER 

 (Maximum and 



Minimum). 



FIG. 304. THERMOMETER, 

 DEEP-SKA, REVERSING TYPE. 



