to the whole, as the Angle of those Planes to the 360 Degrees of the Circle. As for Cones and Pyramids, they are as the Spherical Surface, intercepted by them, is to the Surface of the Sphere; and therefore Cones are as the versed Sines of half their Angles, to the Diameter of the Circle: These three sorts of infinite Quantity are analogous to a Line, Surface and Solid, and after the same manner cannot be compared, or have any proportion the one to the other.
Besides these, there are several other Species of infinite Quantity, arising from the Contemplation of Curves, and their Asymptotes; which, by reason of the difficulty of the Subject, cannot be made so plain to most Readers: But what has been already said, may be sufficient to evince what we undertook to explain.
An Account of Dr. Robert Hook 's Invention of the Marine Barometer, with its Description and Uses; published by order of the Royal Society, by E. Halley , R. S. S.
SInce it was found that the Torricellian Tube , commonly call'd the Mercurial Barometer , by the rising and falling of the Quick-silver therein, doth presage the Changes of the Air,