122 NOVUM OROANUM 



11. Damp hot weather, arising from the constitution of 



the air, without any reference to the time of the year. 



12. Confined and subterraneous air in some caverns, par 

 ticularly in winter. 



13. All shaggy substances, as wool, the skins of animals, 

 and the plumage of birds, contain some heat. 



14. All bodies, both solid and liquid, dense and rare (as 

 the air itself), placed near fire for any time. 



15. Sparks arising from the violent percussion of flint 

 and steel. 



16. All bodies rubbed violently, as stone, wood, cloth, 

 etc., so that rudders, and axles of wheels, sometimes catch 

 fire, and the West Indians obtain fire by attrition. 



17. Green and moist vegetable matter confined and 

 rubbed together, as roses, peas in baskets; so hay, if it 

 be damp when stacked, often catches fire. 



18. Quicklime sprinkled with water. 



19. Iron, when first dissolved by acids in a glass, and 

 without any application to fire; the same of tin, but not so 

 intensely. 



20. Animals, particularly internally; although the heat 

 is not perceivable by the touch in insects, on account of 

 their small size. 



21. Horse dung, and the like excrement from other ani 

 mals, when fresh. 



22. Strong oil of sulphur and of vitriol exhibit the opera 

 tion of heat in burning linen. 



23. As does the oil of marjoram, and like substances, in 

 burning the bony substance of the teeth. 



24. Strong and well rectified spirits of wine exhibit the 

 same effects; so that white of eggs when thrown into it 

 grows hard and white, almost in the same manner as 



