Page:History of the Royal Society.djvu/251

Rh Experiments of volatising Salt of Tartar many Ways; of examining the mucilaginous Matter call'd Star-Shoot; of examining our English Telescopes, and Microscopes, and comparing them with such as have been made at Rome; of making a volatile Salt with Oil of Turpentine, and Sea-salt; of the Quantity of Spirits in Cyder; of the Strength of several Springs, of examining a Pump made with Bellows; of dying Silk with several Jamaica Woods; of finding the Strength of Wood of several Kinds, for bearing; of finding the Flexibility of various Woods, and determining the utmost Extent of their yielding and bending.

Experiments about the Gravity of Bodies made on the Top of St. Paul's Steeple, Westminster Abby, and several other high Places; and in a Well of seventy Fathoms Depth; examined about the Virgula Divina wherein the common Assertions were found false; of the various Refractions of several Liquors, in a new refractive Engine of common Oil of Tobacco, made by Distillation in a Glass Retort; of making the Object Glass of a Microscope to bear as large an Aperture as is desir'd.

Of this their Way of Experimenting I will here produce these Examples.



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