not easily sink: and this, untill exact experiment further determine, may be allowed, as best consistent with this quality, and the reasons alledged for it. As for the cause of this effect, common opinion conceives it to be the salt and bituminous thickness of the water. This indeed is probable, and may be admitted as far as the second opinion concedeth. For certain it is that salt water will support a greater burden then fresh; and we see an egg will descend in salt water, which will swim in brine. But that Iron should float therein, from this cause is hardly granted; for heavy bodies will only swim in that liquor, wherein the weight of their bulk exceedeth not the weight of so much water as it occupieth or taketh up. But surely no water is heavy enough to answer the ponderosity of Iron, and therefore that metal will sink in any kind thereof, and it was a perfect Miracle which was wrought this way by _Elisha_. Thus we perceive that bodies do swim or sink in different liquors, according unto the tenuity or gravity of those liquors which are to support them. So salt water beareth that weight which will sink in vineger, vineger that which will fall in fresh water, fresh water that which will sink in spirits of Wine, and that will swim in spirits of Wine which will sink in clear oyl; as we made experiment in globes of wax pierced with light sticks to support them. So that although it be conceived an hard matter to sink in oyl, I believe a man should find it very difficult, and next to flying, to swim therein. And thus will Gold sink in Quick-silver, wherein Iron and other metals swim; for the bulk of Gold is only heavier then that space of Quick-silver which it containeth: and thus also in a solution of one ounce of Quick-silver in two of _Aqua fortis_, the liquor will bear Amber, Horn, and the softer kinds of stones, as we have made triall in each. But a private opinion there is which crosseth the common conceit, maintained by some of late, and alleadged of old by _Strabo_, that the floating of bodies in this Lake proceeds not from the thickness of the water, but a bituminous ebullition from the bottom, whereby it wafts up bodies injected, and suffereth them not easily to sink. The verity thereof would be enquired by ocular exploration, for this way is also probable. So we observe, it is hard to wade deep in baths where springs arise; and thus sometime are bals made to play upon a spouting stream.