13. Whether an intense and lasting Frost makes any alteration in Quick-silver, exposed very shallow in a flat Vessel.
14. Whether the Purgative virtue of Catharticks be increased or lessened, or even totally destroy'd by a strong and continued Cold?
15. Whether Harts-horn thaw'd, and such like substances, using the same method of Distilling, yield the same quantity of Liquor, which they use to yield, when not frozen?
16. What Cold operates in the Fermentation of Liquors?
17. Whether Birds and Wilde Beasts grow white there in Winter, and recover their native colour in Summer?
18. Whether Colours may be concentred by a sharp cold? E.g. A strong Decoction of Cocheneel in a fit Glass?
19. Whether the Electrical virtue of Amber, and the Attractive and Directive force of the Magnet, be changed by a vehement Cold?
20. Whether pieces of Iron and Steel, even thick ones, be made britle by intense frosts; and therefore Smiths are obliged for prevention, to give their Iron and Steel-tools a softer temper?
21. Whether accurate Observations evince, that all Fishes dye in frozen Waters, if the Ice be not broken? Where it is to be diligently inquired into, whether the Cold it self, or the want of changing or ventilating the water, or the privation of Air, be the cause of the death of Fishes?