Page:History of the Royal Society.djvu/275

 An Instrument for measuring, and dividing the time of their Descent, to the accurateness of two, or three thirds of time, serving also for examining the swiftness of Bodies descending through the Air, and of Bodies shot by a Gun, or Bow.

A Bell for diving under water to a great depth, wherein a man has continued at a considerable depth under water, for half an hour, without the least inconvenience.

Another Instrument for a Diver, wherein he may continue long under water, and may walk to and fro, and make use of his strength and limbs, almost as freely as in the Air.

A new sort of Spectacles, whereby a Diver may see any thing distinctly under Water.

A new way of conveighing the Air under Water, to any Depth, for the use of Divers.

An Instrument for measuring the swiftness, and strength of the Wind.

An Instrument for raising a continual stream of Water, by turning round a moveable valve, within the hollow of a close Cylindrical Barrel.

Several kinds of Thermometers for discovering the heat, and cold of the Air, or any other Liquors: a Thermometer for examining all the degrees of heat in Flames, and Fires, made of several Substances; as also the degrees of heat requisite to melt Solder, Lead, Tin, Silver, Brass, Iron, Copper, Gold.

A Standard Cold several ways.

An Instrument for planting of Corn.

Four several sorts of Hygroscopes made with several Substances, for discovering the drowth, and moisture of the Air.

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