Despite the impracticality
This latter function would of course lead to greater efficiency for the engine overall and is seldom seen on most extant model examples
Although the dates are not perfectly clear
the exposed barometer tube runs centrally down the full length of the instrument with half globe mahogany cistern cover to the base and cistern adjustment screw below
“The face of this ingenious instrument closely resembles that of the 5-dial Air Meter
FitzRoy and his Barometers - Philip R. Collins Books on Antique Stick Barometers Despite the impracticalityTravelling around Cape Horn in stormy weather, the Beagle went under water twice, bobbing up like a barrel, but each time taking on more water; if the Beagle had gone under a third time, it was believed she would have sunk, no doubt with the loss of all life. Her captain, Robert FitzRoy, blamed himself for this near calamity, having not taken enough notice of the falling barometer. He never forgot this incident and became a firm believer in the value