Sporton's improved form of Graham Bell's original sounder

Sporton's improved form of Graham Bell's original sounder for

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Sporton's improved form of Graham Bell's original sounder for
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© The Board of Trustees of the Science Museum

Sporton's improved form of Graham Bell's original sounder for indicating leakage in water mains

Details

Category:
Water Supply Metering
Object Number:
1901-119
type:
sounder
credit:
Sporton, H.H.