- Ignited meteors.
- Burning lightning.
- Eruptions of flames from the cavities of mountains, etc.
- Flame of every kind.
- Ignited solids.
- Natural warm baths.
- Warm or heated liquids.
- Warm vapors and smoke; and the air itself, which admits a most powerful and violent heat if confined, as in reverberating furnaces.
- Damp hot weather, arising from the constitution of the air, without any reference to the time of the year.
- Confined and subterraneous air in some caverns, particularly in winter.
- All shaggy substances, as wool, the skins of animals, and the plumage of birds, contain some heat.
- All bodies, both solid and liquid, dense and rare (as the air itself), placed near fire for any time.
- Sparks arising from the violent percussion of flint and steel.
Table of Contents
APHORISMS—BOOK II ON THE INTERPRETATION OF NATURE, OR THE REIGN OF MAN
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