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MISCELLANEOUS ADVERTISEMENTS.
65
SECURED BY ROYAL LETTERS PATENT IN 1866.
GREAT BRITAIN, FRANCE. BELGIUM, AND UNITED STATES.
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3jtonoui|altile pt^ention at !tfa»|i8 lixhibition J $67.
This Valve is the ordinary Steam Valve, until undue loeight is applied, when it
"becomes a Safety Valve. Firemen are unable to tamper with this Valve, either
with Steam off or on. Indicates Deficiency of Water in Boiler. The Insecurity
to Life and Destruction to Property arising from Over- Pressure or Deficiency of
Water are completely Guarded Against. No Steam-Boiler should be without it.
The Valves are tested according to Pressure wanted before being sent out.
When ordering Valve, please give Diameter of Boiler, and stipulate Pres-
sure of Steam.
RECOMMENDED BY THE BOILER INSURANCE COMPANY.
NUMEROUS TESTIMONIALS OF APPROVAL.
21 LEITH WALK, EDINBUEGH.
Descriptive and Priced Circular on Application,
____^_ J. R. SWANlf.
Mechanics' Magazine, Kov. 1866. — " Constructed upon a good principle, and addi-
tion to weight upon the lever will actuaUi/ relieve the pressure."
Engineer, Nov. 1866. — "Only requires to be known to be univermlly adopted."
English Mechanic, Nov. 1866. — " Claims a decided advantage over tlie valves at
present in use."
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