English, c.1875, engraved C W Dixey Optician to the Queen 3 New Bond St London, with tall rectangular silvered scale with siphon tube with open bulb at the bottom and sealed bulb to the top filled with a clear liquid, thermometer to the left with mercury tube with Fahrenheit scale ranging between 20 & 140, adjustable silvered scale to the side with expanded scale annotated for barometric inches and with the usual weather observations, the lower left edge with silvered circular recording disc labeled REGISTER, engraved with barometric scale visible through an arched aperture, height 59cm