Page:History of the Royal Society.djvu/245

 of the Air-bubbles that lurk'd in it: of forcing Water out of a Vessel by its own Vapours.

Experiments of the different Weight and Refraction of warm Water and cold: of the passing of Water through the coats of a Man's Stomach: of the living of Fish in Water, the Air being exhausted: of closing up a Fish in a Glass of Water; of the dying of Fishes in Water, upon taking off the Pressure of the Air, in the rarifying Engine: of Hydrostaticks, and making a Body sink by pouring more Water upon it; of raising Water above its Standard by sucking: of the subsiding of Water in the Stem, upon putting the Bolt-head into warm Water; of the shrinking of Water upon cooling.

The fourth Kind are about Mines, Metals, Oars, Stones, &c. Such as

Experiments of Coppelling made at the Tower; of dissolving many Salts in one Liquor; of the Oculus Mundi; of Rusma; of the Tenacity of several Metals examin'd by Weights; of the rarefaction and condensation of Glass; of the volatising Salt of Tartar, with burnt Alom, with Vinegar and Spirit of Wine; on the Bononian Stone; on Diamonds, of their shining by rubbing; on Copper-oar; of the Distillation of Coal; of refining several Kinds of Lead-oar; of extracting a much greater Quantity of Silver out of that Oar, than is commonly done; of several Ways of reducing Letharges into Lead; of changing Gold into Silver.

Experiments Magnetical, of the best Form of capping Loadstones; of the best Forms of Needles, of several Lengths and Bignesses: of various Ways of touching Needles on the Loadstone; of making the