A glass tube of 6mm bore is enclosed in an enamelled and lacquered brass case, mounted on
a polished wooden board with plates for fixing on wall. Open plate reflectors, ring and screws for vertical
adjustments. A
dual scale graduated in 25 to 32 inches and 640 to 810mm is read by verniers moving by rack and
pinion, reading to 0.002 inch
and 0.1mm are enclosed in a glass cylinder. A glass cistern at the lower end of
barometer is provided with an ivory point to
adjust the level of mercury. A thermometer -10 to 50°C is provided on
the wooden board. Supplied without mercury and glass
case.
