AIR GAUGES 



have a table of raised letters at least 

 date of application and removal, thus. 



in. high to show the 



"All markings are to be full and distinct and made on a thin 

 layer of white or red rubber, vulcanized, and so applied as to be 

 removed by cutting with a knife or sharp instrument." 



AIR GAUGES 



TYPES OF GAUGE 



The 5-in. duplex air gauge, Piece No. 23,334, and shown in 

 Fig. 1, has a brass case with silvered dial; it is used with ET 

 locomotive and old-standard engine equipments. The weight 

 is 3f Ib. 



PIG. 1 



The 3J-in. duplex air gauge, Piece No. 23,338 and shown in 

 Fig. 2, has a brass case with a silvered dial; it is used with ET 

 locomotive equipment. The weight is 2J Ib. 



