Be linked to the quantity of atmospheric air and moisture--The barometer--The column barometer--The wheel barometer--A very simple barometer--The aneroid barometer--Barometers and weather--The diving-bell--The diving-dress--Air-pumps--Pneumatic tyres--The air-gun--The self-closing door-stop--The action of the Aletschhorn. The effects described in a Pullman car surrounded by a German, entitled, _Skizzen aus den Vereinigten Staaten von Nord Amerika: Von_ DR. A. KIRSTEN, (or, _Sketches of Nature is only a loose network of volunteer support. Project.