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Late 19th to early 20th century wooden Chinese Diptych
Square lenses are a magnifier that can be removed by unhooking from frame
and timeless piece- fitting for any room
allowing the gold leaf to gradually return to its vertical stationary position
Plate Marked: LLOYD'S HYGRODEIK / TYCO'S / ROCHESTER
Leslie's Differential Thermometer radio Late 19th to early 20thPristine late 19th century Leslie's Differential Thermometer. Italian made, unsigned. Excellent condition, complete original. Originally invented by John Leslie in the early 1800's; Differential Thermometers are used to measure variations in temperature. This instrument works by adding a working liquid, such as Sulphuric acid to the 'wet bulb' (unnumbered side of U). Once the temperature rises, the pressure in the tube will push the liquid to the 'dry
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