oraries as if he had almost exhausted the
possibility of discovery; but did it so appear to Newton? Did it seem to
him as if he had seen far and deep into the truths of this great and
infinite universe? It did not. When quite an old man, full of honour and
renown, venerated, almost worshipped, by his contemporaries, these were
his words:--

"I know not what the world will think of my labours, but to myself it
seems that I have been but as a child playing on the sea-shore; now
finding some pebble rather more polished, and now some shell rather more
agreeably variegated than another, while the immense ocean of truth
extended itself unexplored before me."

And so it must ever seem to the wisest and greatest of men when brought
into contact with the great things of God--that which they know is as
nothing, and less than nothing, to the infinitude of which they are
ignorant.

Newton's words sound like a simple and pleasing echo of the words of
that great unknown poet, the writer of the book of Job:--

"Lo, these are parts of His ways,
But how little a portion is heard of Him;
The thunder of His power, who can understand?"

END OF PART I.

PART II

_A COUPLE OF CENTURIES' PROGRESS._

NOTES TO LECTURE X

_Science during the century after Newton_

The _Principia_ published, 1687

Roemer 1644-1710
James Bradley 1692-1762
Clairaut 1713-1765
Euler 1707-1783
D'Alembert 1717-1783
Lagrange 1736-1813
Laplace 1749-1827
William Herschel 1738-1822

_Olaus Roemer_ was born in Jutland, and studied at Copenhagen. Assisted
Picard in 1671 to determine the exact position of Tycho's observatory on
Huen. Accompanied Picard to Paris, and in 1675 read before the Academy
his paper "On Successive Propagation of Light as revealed by a certain
inequality in the motion of Jupiter's First Satellite." In 1681 he
returned to Copenhagen as Professor of Mathematics and Astronomy, and
died in 1710. He invented the transit instrument, mural circle,
equatorial mounting for telescopes, and most of the other principal
instruments now in use in observatories. He made as many observations as
Tycho Brahe, but the records of all but the work of three days were
destroyed by a great fire in 1728.

_Bradley_, Professor of Astronomy at Oxford, discovered the aberration
of light in 1729, while examining stars for parallax