Two hygrometers in a wooden case

Made:
Poultry
patentee:
Robert Brettell Bate
and
Robert Brettell Bate
and
Two hygrometers in a wooden case, made and patented by R.B

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Two hygrometers in a wooden case, made and patented by R.B
Science Museum Group
The Board of Trustees of the Science Museum

Two hygrometers in a wooden case, made and patented by R.B. Bate, London