Professor Joly has made an estimate of the quantity of salt daily added to the sea by all the rivers of the globe.

The Earth's Beginning by Robert S. Ball is part of the HackerNoon Books Series. Read this book online for free on HackerNoon!

The fundamental distinction between stars and planets was noticed by acute observers of Nature in the very earliest times

Among the nebulæ which possess sufficient individuality to merit study for our present purpose, I must mention the so-called Dumb-bell.

The famous discovery of Sir W. Huggins has removed the first great objection to the Nebular Theory.

The instrument employed in sinking a hole of such a phenomenal depth through solid rock is characteristic of modern enterprise.

The effect of this long continuance of great pressure upon the pebbles of the conglomerate in certain parts of the country has been most astonishing.

Radiation from such a source would give light with a continuous spectrum, like that from the sun or a star.

The contraction, or rather the condensation, of the material would of course generally be greatest at the central portion of the nebula.

We must understand the composite nature of the primitive fire-mist from which our solar system originated

The argument on which we are to enter is, it must be confessed, somewhat subtle, but its cogency is irresistible.

Professor J. J. Thomson recently discovered that there are corpuscles of matter very much smaller than atoms.

Jupiter also turns on its axis, and Jupiter again, like the earth, might turn either with the sun or it might turn in the opposite direction.

No one will deny that there are points in connection with the nebular theory which present difficulties which to some seem important.

In the beginning of the evolutionary history the sun was a nebula, which we have supposed to extend in every direction to an indefinitely great distance

Your next lesson will be to utilize the Great Bear for the purpose of pointing out the Pole Star.