45, COBNHILL, E.G., AND 122, EEGETNT STEEET, W., LONDON. 209 



612 BOURDON'S HYDRAULIC GAUGES*. 



With Central Hands, divided from 300 Ibs. up to 5 tons per square inch. 



613 



d. 







Cocks for above Gauges (if required) 30s. each, extra. 



BOURDON'S STANDARD AND DUPLEX GAUGES. 



Used by Inspecting Engineers for Testing Gauges and Boilers. 



Fig. 12. Pocket Standard Gauge, with open face, in polished 

 brass case, engraved dial, graduated to 300 Ibs. per 

 square inch, in morocco case and clamp screw each 



Fig. 13. Two Gauges as the preceding, but fixed on the same 

 union and in a mahogany box . . . per pair 



Fig. 14 Pocket Standard Duplex Gauge, in polished brass 

 case (5 inches diameter) engraved dial graduated to 

 300 Ibs. per square inch, in Leather case with clamp 

 screw ........ each 



Fig. 15. Standard Duplex Gauge, with two concentric hands, 

 polished brass case, graduated to 300 Ibs. per square 

 inch, with gun-metal cock .... each 



Fig. 16. Standard Duplex Gauge, with independent hands, 

 &c., as last 



DlAMKTER. 



3 inches. 5 inches. 



3 



7 inches. 



3 16 3 



7 13 



6 5 



10 inches. 



500 



3 14 4 15 



EXTRA CHARGES. 



614 



615 



Fig. 17. Bourdon's Registering Gauge, in japanned case, graduated to 

 100 Ibs. per square inch, with gun-metal Cock and Union, and 100 printed 



cards 7 15 



Extra cards, (if required) per 100 080 



Fig. 18. Bourdon's Double Gauge, to be set in Engine-rooms, and showing 

 on the same dial (10 inches diameter), pressure of Steam in the Boiler, 

 and the amount of Yacuum in the Condenser, Polished brass case, and two 

 Cocks with Union . 600 



* A Table of Hydraulic Pressure will be found in the Appendix. 



