This price and these weights may become much less after a
time. The expense for wages and repairs will be less than 1/4d. per hour
per horse-power, which would be L24 a day, or L8,800 a year; thus the
total cost of one horse-power for an hour stored up at the works is
3/4d. Allowing that the carriage will cost as much as the production and
storing, we have what is stated above, viz., that the total cost within
3 miles of the works is 11/2d. per horse-power per hour. This quantity of
electricity will produce a light, according to the amount of division,
equivalent to from 5 to 30 gas burners, which is much cheaper than
gas.--_Chemical News_.
* * * * *
PHYSICAL SCIENCE IN OUR COMMON SCHOOLS.
[Footnote: Read before the State Normal Institute at Winona, Minnesota,
April 28, 1881, by Clarence M. Boutelle, Professor of Mathematics and
Physical Science in the State Normal School.]
Very little, perhaps, which is new can be said regarding the teaching
of physical science by the experimental method. Special schools for
scientific education, with large and costly laboratories, are by no
means few nor poorly attended; scientific books and periodicals are
widely read; scientific lectures are popular. But, while in many schools
of advanced grade, science is taught in a scientific way, in many others
the work is confined to the mere study of books, and in only a few of
our common district schools is it taught at all.
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