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Fireside Chat ‘Alva Mason, Philadelphia Instrument Maker, 1824-1860’
Fireside Chat ‘Alva Mason, Philadelphia Instrument Maker, 1824-1860’
A brass plaque signed "A. MASON PHILADELPHIA". Presented by Steve Beare, USA. Abstract The first instrument that inspired the author to collect and study scientific instruments, an inclined plane, was purchased in 1984. It has a brass plaque signed "A. MASON PHILADELPHIA". No other examples of signed Mason instruments were located at the time. In …
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