Invention of the pump. The piston lifts the atmosphere above it. The surrounding atmosphere presses up the water into the vacuum. Manner in which a child sucks 366
Air-cell in engines for extinguishing fire. Water dispersed by the explosion of Gunpowder. Houses preserved from fire by earth on the floors, by a second ceiling of iron-plates or coarse mortar. Wood impregnated with alabaster or flint 406
Muscular actions and sensations of plants 460
River Achelous. Horn of Plenty 495
Flooding lands defends them from vernal frosts. Some springs deposit calcareous earth. Some contain azotic gas, which contributes to produce nitre. Snow water less serviceable 540
CANTO IV.
Cacalia produces much honey, that a part may be taken by insects without injury 2
Analysis of common air. Source of azote. Of Oxygene. Water decomposed by vegetable pores and the sun's light. Blood gives out phlogiston and receives vital air. Acquires heat and the vivifying principle 34
Cupid and Psyche 48
Simoom, a pestilential wind. Described. Owing to volcanic electricity.
Not a whirlwind 65