“ Whether they have any Signs, whereby to know whether the Fusion have been well or ill perform'd; and the Metal have obtain'd the perfection, to be expected from such Ore, melted in such a Furnace?
84. Whether they observe any great difference in the goodness of the Metal, that first melts, from that of the rest of the Metal which comes afterwards in the same or another operation? And whether the Rule holds constantly? (For, though they observe in Tin-Mines, the best Metal comes first, yet in the works of an Industrious friend of mine, he informs me, that the best Metal comes last.) ”

“ 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 Quæries recommended about a Twelve-month ago. ”

“ Which is especially to be inquired into, in case the Mine be of a base metal, that holds a noble metal: (As I have known it observ'd, that Lead-Ore, that is poor in its own metal, affords more Silver, than other; and I remember, that the Ore lately mention'd, being rich in Lead, scarce afforded us upon the Cuppel, an Atome of Silver. And Matthesius informs us, that a little Gold is not unfrequently found in Iron-Ore. And I have by me some Gold, that never endur'd the Fire, taken out of a Lump of Tin-Ore.) ”

“ Whether the Vein lie near, or much beneath the surface of the Earth, and at what depth?
53. Whether the Vein have or have not any particular Concomitants, or Coats (if I may so call them;) and, if any, what they are, and in what order they lie? (As the Veins of Lead-ore, with us, have frequently annext to them a substance call'd Sparre, and next to that another call'd Caulk.
54. Whether (besides these Coats) the Vein have belonging to it any other Heterogeneous substance? (As in Tin-mines we often find that yellow substance, which they call Mundick.) ”

“ Whether or no they do, either to facilitate the fusion, or to obtain the more or better Metal, mingle differing sorts or degrees of Ore of the same metal? (As in some places 'tis usual, to mingle poor and rich Ore; and at Mendip they mix two or more of those differing kinds of Lead-ore that they call Frim-ore, Steel-ore, Potern-ore, &c.) ”

“ What is the fineness and goodnefs of the Ore, by which the Mine is wont to be estimated? And what are the marks and characters, that distinguish one sort from another?
64. What proportion of Metal it affords? (As in our Iron-mines 'tis observed, that about three Tuns of Iron-stone will afford one Tun of Metal: And I have had Lead-Ore, which an Ingenious man, to whom I recommended such Tryals, affirm'd to me to afford three parts in four of good Lead.) ”

“ 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? ”

“ Whether they observe in the Trees and other Plants, growing over or neer the Mine, not only, (as hath been already intimated) that the Leaves are any whit gilded or silver'd by the ascending Mineral Exhalations, but also, that the Trees or other Plants are more solid and ponderous? And if they have not also some discernable Metalline or Mineral Concretes, to be met with in the small Cavities and Pores of their substance?
8. Whether there be not Springs, and also greater Streams of Water neer the Mine, that rise, and run their whole course under ground, without ever appearing above it? ”

“ Lastly, that those Fishes that lie in slimy or clayie ground, dye not so soon as others. But, he adds, that even in great Lakes, when 'tis a very bitter Frost, Ice is wont to be broken, either by the force of the Waves, or of the Imprisoned Vapors, raised by the agitation of the Water, and then bursting out with an impetuosity; witness the noise made by the rupture of the Ice through the whole length of such Lakes, which he affirms to be not less terrible than if many guns went off together. Whereby it falls out, that Fishes are seldom found dead in great Lakes. ”

“ What truth there is in that Relation concerning Swallows being found in Winter under waters congealed, and reviving, if they be fish'd and held to the fire?
7. Whether there be in the Bodnick Bay a Whirl-pool, as is related to be in the Sea of Norway, which is commonly call'd. the Maal-stroom? And whether there be any Signs, that speak the communication of those Gulphs by subterraneous passages; as the Jesuit Kircher affirms in his Mundus Subterraneus T. 1. p. 146?
8. To what depth the Cold in those parts peirces the Earth and Water?
9. Whether their Watches go slower by the intense cold? ”

“ Whether the Natives, and other Inhabitants, live longer or shorter than ordinary? Whether they live more or less healthy? Whether they be subject to any Epidemical Diseases, that may very probably be imputed to the Mines; and what these Diseases are; and what Remedies are found successful?
5. Whether the Country be, or be not furnish'd with Rivers, Brooks, Springs, and other Waters; and how these waters are conditioned?
6. Whether the Air be dry or moist; hot or cold; clear or foggy; thick or thin; heavy or light ”

“ What are the kinds, length, bigness, and way of placing the Timber, Poles, &c. that are employed to support it? And how long the Wood will last, without being spoyled with the subterraneous fumes and waters? and what wood lasts longest?
75. What Air-shaft belongs to the Mine? Whether it be single, or more than One? Of what breadth the Air-shaft is at the Orifice? Whether it be convenient enough, or not? How neer it is placed to the Groove; and in what position? And if there be several Air-shafts, what their Distances and scituation are in reference to the Groove, and to each other? ”

“ A considerable piece of the grand Design of the Modern Experimental Philosophers being, to procure and accumulate Materials for a good Natural History, whence to raise in progress of time a solid Structure of Philosophy ”

“ That himself hath seen and had Hares, which about the beginning of Winter and Spring were half White, and half of their native colour: that in the midst of winter he never saw any but all white. That Foxes also are white in Winter; and Squirrels grayish, mixt of dark and white colour.
5.⁠That 'tis known there generally, that Fishes are killed, by reason of the Ice not being broken: but first, in ponds only or narrow Lakes; next, in such Lakes only, Where the Ice is pretty thick; for, where 'tis thin, they dye not so easily. ”

“ That he is confident, the Royal Society of England will do much good for the advancement of usefull Knowledge.
2.⁠That he conceives Amber to be a kind of Fossil Pitch, whose Veins lie at the bottom of the Sea; believing that it is hardned in tract of time, and by the motion of the Sea cast on shore: He adds, that hitherto it hath been believed, not to be found but in Borusia ”