the sun the same number enters, this process must forever keep the sun supplied. Is it not true of the waters of the Niagara Falls that no more flows down its stream than has already ascended to the clouds in vapor, then may it not be equally true of the sun’s light and heat? The gravitation that applies to bodies may also apply to light, and give to it as much greater an orbit than that of comets as comets have greater than that of the planets. Though light may have a vastly greater ellipse it may in the end return to the sun which projects it, to be again projected. When we think of the molecules in space that everywhere seem to possess the same properties, and the vastness of that space, we are ready to conceive that light may have the same unending properties. Again, in reference to the stars burning out, or growing old—as is believed by some to be the case with our own sun and other suns in space, because of their varied colors and appearances—the following thoughts may be suggested. At times our sun seems to have dark spots upon its surface, while in other places great prominences are observed. This being the case who believes that everywhere the sun emits the same light and heat; and if not what must be the effect at our distance from the sun whether a dark spot, or a great projection of flaming hydrogen is directly before us? Let us imagine a sphere, with the sun for its centre, that has a radius reaching out a little way beyond earth, and a surface that might contain 1200 millions of bodies like our earth. Supposing earth to occupy, in turn, each of these 1200 millions of places we cannot believe the sun to have the same appearance from each of them. We are told by Prof. Ball that masses of vapor are frequently expelled from the interior of the sun with a speed of from 300 to nearly 1,000 miles a second, although the fact would hardly be credible only that the spectroscope enables the observer to actually witness the ascent of these solar prominences at a distance of more than ninety millions of miles. Now from these facts would one suppose that the sun could appear the same when viewed from each of those 1,200 millions of places?