er?

9. Whether their Watches go slower by the intense cold?

10. Whether their Oyls in hard frosts are turn'd into true, that is, hard
and britle, Ice?

11. Whether they can freeze there a strong Brine of Bay-Salt; and a strong
Decoction of _Sal Gemmae_, or Soot; or a strong Solution of _Salt_ of
_Tartar_, or of _Sugar_ of _Lead_?

12. Whether they can congeal meer _Blood_, all the serous part thereof
being sever'd? Item, _Canary_ Wine; the _Lixiviums_ of Soap-boylers, and
such as are prepared of other Salts; as also, the Spirits extracted out of
Salts, as Spirit of _Vitriol_, _Nitre_, &c?

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? {346}

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?

22. Whether any Physicians or Anatomists have inquired, by freezing to
death some Animals (as Rabits, Pullets, Dogs, Cats, &c.) after what manner
it is, that Intense Cold kills men? whether they have found any Ice in the
Inner parts; and if so, in which of them; Whether in the Ventricles of the
Brain and Heart; and in the greater Vessels?

_These were the Queries_ recommended about a Twelve-month ago. Monsieur
_Heuelius_ in a late Letter of his, accompanied with several papers from
others, returns this Accompt.