An account of a portable barometer, with reasons and rules for the use of it : how to weigh the air, measure its height, and foretell all the alteration of weather, the constitution of the atmosphere, and how the effluvia keep off the airs gravitation : with a new account and experiments, how rain, snow, winds, frost, thunder, lightning, hurricans and tornados are produced, and an inquiry, whether the planetary beams or influence can cause an alteration of weather, to be foretold by them : with a sensible demonstration of their influences and the insufficiency of all hygroscopes, thermometers, and other inventions, to discover the alterations of weather by : and lastly, rules and experiments for the certain knowledge of all the alterations of weather, both in quantity and quality /