who were the investigators, and what
was their method of investigation? If such questions cannot be
answered, the theories deserve little attention.

TWENTIETH CENTURY SCIENCE, DAWNING AT THE END OF THE NINETEENTH.--In
the 20th century, Psychometry will become the guide of the nations.
The world will understand itself. Every mile on the surface of the
globe will be familiarly known.

An important event anywhere will be immediately known everywhere. The
planets and their inhabitants will be known, and much more known that
need not be mentioned at present. The healing art will approximate
perfection. Criminals will be reformed. Their number will be
diminished. The juvenile nations of the earth will be more or less
under the care of the adolescent and peace will be maintained.

These are not psychometric forecasts, but rational inferences, from
our increasing rate of progress.

COMPARATIVE SPEED OF LIGHT AND ELECTRICITY.--The French physicist
Fizeau calculated the velocity of light at 185,157 miles a second;
Cornu, another Frenchman, calculated it at 185,420, and Michelson
obtained 186,380 as the result of his calculation. Wheatstone, the
English electrician, found that free electricity travelled 288,000
miles a second; Kirchoff concluded, from theoretical considerations,
that an electrical current sent through a wire in which it meets no
resistance has the velocity of 192,924 miles a second. The velocity of
an electric current sent through iron wire is 62,100 miles a second;
through copper wire, 111,780 miles. We think justice will be done by
deciding that electricity is the faster.--_N. Y. Sun_.

Yet practically speaking, electricity in wires is much slower. Prof.
Gould found that telegraph wires at a moderate height, transmit
signals at the rate of 12,000 miles a second; but if the wires are
suspended high enough, the velocity may be raised to 16,000 or even
24,000 feet a second. Subterranean wires and submarine cables transmit
slowly. Wheatstone's experiments were made fifty-four years ago, and
have not since been confirmed. I would say light is the faster, for
electric currents are always retarded by the medium.

WONDERFUL PHOTOGRAPHY.--Dr. H. G. Piffard exhibited in New York to a
society of amateur photographers a new method of taking instantaneous
photographs by means of a brilliant light made by sprinkling ten or
fifteen grains of magnesium powder on about six grains of gun-cotton.
When this is flashed