198 



L. CASELLA'S CATALOGUE 



FIG. 2309*. 



FIG. 2309. 



FIG. 2313. 



2310. PEESSUEE GAUGE, as No. 2309, 6 inch, diameter . . 1110 



2311. PEESSUEE GAUGE, 6 inch, diameter, with central hand (fig. 2309), to indicate .TV 



pressure up to 1501bs. -on the square inch, and fitted with gun metal coc.v 



186 



2312. PEESSUEE GAUGE, 5 inch, diameter (fig. 2313), to indicate any pressure up to 120 



Ibs. on the square inch, and fitted with gun metal cock . 140 



2313. PBESSUEE GAUGE, 4 mch. diameter (/-. 2313), ditto, . . 120 



2314. PEESSUEE GAUGE, 3 inch, diameter (fig. 2313), ditto, . . 110 

 Vacuum gauges, 4, 5, 6, or 7 inch, diameter, same prices as the above pressure gauges. 



*^* These gauges, as well as the next following, are guaranteed for two years if properly 

 fixed, and any becoming deranged before that time will be replaced by new instruments. 



If the gun metal tap is not required on the Bourdon gauges, 3s. 6d. each is deducted from 

 the price. 



*#* With orders for any of the above, the pressure to which the gauge is required should be 

 stated, the usual ranges being approximately 50, 100, 150, 200, and 3001bs. 



2315. Hydraulic Pressure Gauges (carefully tested), in 6 inch, circular brass frames, 



registering up to 2 tons per square inch . ..,,.-. 300 



2316. HYDEAULIC PEESSUEE GAUGES, as above, to any pressure up to 10 tons per 



square inch, with maximum pointer . . ->-< 4* 2 



2317. HYDEAULIC PEESSUEE GAUGE, for showing the exact pressure on hydraulic 



presses whilst in operation. The testimonials in favour of this gauge 

 are of the highest order, and are from the leading metropolitan and pro- 

 vincial firms employing hydraulic pressure . . . 600 

 *#* Any of the above gauges repaired, adjusted, or any part renewed. 



CASELLA'S MERCURIAL PRESSURE AND VACUUM GAUGES, the action being 



according to Boyle or Harriot's " Law of Compressed Air." The great attention given 

 by L. CASELLA to the construction of gauges on this principle, renders them in every 

 way, but portability, the safest, most permanent, and accurate gauges in use. 



2318. MEECUETAL PEESSUEE GAUGE, in polished mahogany frame, 25 inch, long by 



5 wide, with strong union joint, to any pressure frcrn SOlbs. to SOOlbs. per 

 square inch (fig. 2318), p. 199 . . . 200 



