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 roving and laborious Dr. Berthold, [Footnote: 'John Toland und der Monismus der Gegenwart,' Heidelberg, Carl Winter.] entitles Toland to be controlled by such rigidly accurate enquiries that we have.