lano-concave, are produced. These
were cast by Mantois, of Paris, whose superiority to the American
manufacturers of optical glass is recognized.

It is estimated that the Yerkes telescope will gather three times as
much light as the twenty-three-inch instrument of the Princeton
Observatory. It surpasses in the same respect the twenty-six-inch
telescope at the National Observatory in the ratio of two and
three-eighths to one. It is in the same particular one and four-fifth
times as powerful as the instrument of the Royal Russian Observatory
at Pulkova; and it surpasses the great Lick instrument by twenty-three
per cent.

What the practical results of the study of the skies through this
monster instrument will be none may predict. Theoretically it is
capable of bringing the moon to an apparent distance of sixty miles.
Under favorable circumstances the observer will be able to note the
characteristics of the lunar landscape with more distinctness than a
good natural eye can discern the outlines and character of the summit
of Pike's Peak from Denver. The instrument has sufficient power to
reveal on the lunar disc any object five hundred feet square. Such a
thing as a village or even a great single building would be plainly
discernible.

Professor C.A. Young has recently pointed out the fact that the Yerkes
telescope, if it meets expectation, will show on the moon's surface
with much distinctness any such object as the Capitol at Washington.
It is complained that in America wealth is selfish and self-centred;
that the millionaire cares only for himself and the increase of his
already exorbitant estate. The ambition of such men as Lick of San
Jose and Yerkes of Chicago, seems to ameliorate the severe judgment of
mankind respecting the holders of the wealth of the world, and even to
transform them from their popular character of enemies and misers into
philanthropists and benefactors.

THE NEW ASTRONOMY.

This century has been conspicuous above all centuries for new things.
Man has grown into new relations with both nature and thought. He has
interpreted nearly everything into new phraseology and new forms of
belief. The scientific world has been revolutionized. Nothing remains
in its old expression. Chemistry has been phrased anew. The laws of
heat, light and electricity have been either revised or discovered
wholly out of the unknown. The concept of universal nature has been so
translated and reborn that a philosop