210 



NEGRETTI AND ZAMBRA, HOLBORN YIADUCT, B.C., 



FIG. 24. 



FIG. 20. FIG. 21. 



FIG. 19. 



FIG. 23. FIG. 22. 



616 FITTINGS AND CONNECTIONS FOR BOURDON'S GAUGES. 



Fig. 19. Connecting Screw Joint 



Figs. 20 & 21. Gun Metal Cock 



Figs. 22 & 23. Three-way Cock for Standard Test Gauges 



Fig. 24. Iron Syphon, with Union .... 



Fig. 24. Copper Syphon, with Union 







each 



s. d. 



1 6 



040 

 060 

 040 

 046 



Purchasers are desired to examine and compare M. Bourdon's Gauges. They 

 will find the works to be constructed and finished like a watch, whilst the majority 

 of imitations are put together ROUGH FROM THE CASTINGS, consequently liable to 

 adhere and give erroneous indications. 



NEGRETTI & ZAMBRA, SOLE AGENTS FOR BOURDON'S GAUGES. 



GUN-METAL FITTINGS FOR MARINE, LOCOMOTIVE, AND OTHER 

 STEAM ENGINES AND BOILERS. 



Gun-metal Steam and Water Taps of all sizes and shapes, Safety Valves, Steam 

 Whistles, Gauge Taps, High Pressure Water and Steam Yalves, Gas Yalves, Boiler 

 Fittings of all kinds, Feed Pumps and Valves, Wrought Iron Steam, Gas, and 

 Water Tubes, Boiler Tabes, Hand Force Pumps, Fire Engine and Brewery fittings, 

 Pump fittings, Caps and Screws of every form, Hydraulic Presses and Force 

 Pumps, Hydraulic Rams of various sizes and construction, Turning Lathes and 

 Tools, Portable Forges and Smiths' Tools, &c., &c., Fencing Wire, Railway Metal 

 Bars, Tools and appliances of all kinds supplied to order by Negretti and Zambra, 

 of the very best manufacture. 



Foreign Correspondents sending particulars of their requirements to Negretti and 

 Zambra may rely upon thepersonal attention of the Firm in carrying out commissions 

 entrusted to them in this special branch of their Shipping Business. 



At pages 95 to 110, will be found Anemometers for testing Yentilating or 

 Furnace Shafts and Wind Pressure, Recording Anemometers, and Tide Gauges, &c. 



