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

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

Change of wind owing to small causes. If the wind could be governed, the products of the earth would be doubled, and its number of inhabitants increased 308

Mr. Kirwan's treatise on temperature of climates 342

Seeds of plants. Spawn of fish. Nutriment lodged in seeds. Their preservation in their seed-vessels 355

Fixed stars approach each other 369

Fable of the Phoenix 377

Plants visible within bulbs, and buds, and seeds 383

Great Egg of Night 406

Seeds shoot into the ground. Pith. Seed-lobes. Starch converted into sugar. Like animal chyle 411

Light occasions the actions of vegetable muscles. Keeps them awake 422

Vegetable love in Parnassia, Nigella. Vegetable adultery in Collinsonia 456

Strong vegetable shoots and roots bound with wire, in part debarked, whence leaf-buds converted into flower-buds. Theory of this curious fact 463

Branches bent to the horizon bear more fruit 466

Engrafting of a spotted passion-flower produced spots upon the stock.
Apple soft on one side and hard on the other 483

Cyprepedium assumes the form of a large spider to affright the humming- bird. Fly-ophris. Willow-wren sucks the honey of the crown-imperial 505

Diseases of plants four kinds. Honey-dew 511

Ergot a disease of rye 513

Glass unannealed. Its cracks owing to elasticity. One kind of lead-ore cracks into pieces. Prince Rupert's drops. Elastic balls 519

Sleep of plants. Their irritability, sensibility, and voluntary motions 538