Page:History of the Royal Society.djvu/280

 which have been since compos'd by some of their Body, or read before their weekly Assemblies, and directly concern the advancement of their Work, these are the principal.

Several Hypotheses explaining the divers Phases and Motions, and other Phænomena of the Comets.

Several Hypotheses of Saturn, and its Satellites.

An Hypothesis of the cause of the Rugosity of the Moon's surface.

An Hypothesis of the motion of the Moon, and of the Sea depending upon it.

An Hypothesis of the motion of the Planets, and of Circular Motion in general.

Several Hypotheses for the Æquation of Time.

A Discourse about the possibility of the Retardation of Celestial Motions, and of their going slower, and slower, the longer they last.

A Discourse of making the several Vibrations of a Pendulum æqual, by making the weight of it move in a Cycloid instead of a Circle.

Several Discourses, and Hypotheses about the length of a Pendulum, for moving once in a second of Time.

A Discourse of the most convenient length of a Pendulum, for making a Standard for a universal Measure.

Several Astronomical Discourses of Mr. Hortex retriev'd, and digested for the Press.

Uleg Beg translated, about the places of the fix'd Stars, and several other Astronomical Observations.

A Discourse about the possibility of the change of the attractive power of the Earth, and consequently of the variation of the vibrative motion of Pendulums.

A Discourse about short inclining Pendulums, and of other Pendulums counterpois'd above the Center of Rh