Contagion either animal or vegetable 82
Thyrsis escapes the Plague 91
Barometer and air-pump, Dew on exhausting the receiver though the hygrometer points to dryness. Rare air will dissolve or acquire more heat, and more moisture, and more electricity 128
Sound propagated best by dense bodies, as wood, and water, and earth.
Fish in spiral shells all ear 164
Discoveries of Dr. Priestley. Green vegetable matter. Pure air contained in the calces of metals, as minium, manganese, calamy, ochre 166
Fable of Proserpine an antient chemical emblem 178
Diving balloons supplied with pure air from minium. Account of one by
Mr. Boyle 195
Mr. Day. Mr. Spalding 217
Captain Pierce and his daughters 219
Pestilential winds of volcanic origin. Jordan flows through a country of volcanos 294