The Wonder Book of Knowledge: The Marvels of Modern Industry and Invention, the Interesting Stories of Common Things, the Mysterious Processes of Nature Simply Explained
History
The Wonder Book of Knowledge: The Marvels of Modern Industry and Invention, the Interesting Stories of Common Things, the Mysterious Processes of Nature Simply Explained
Industrial arts -- History
over 920,000, and the reserves of the other states amount to a very
considerable area.
[Illustration: FOREST SERVICE--A LOOKOUT STATION]
[Illustration]
How did the Fashion of Wearing Cravats Commence?
Cravats get their name from the French “cravate,” meaning a croat,
because this piece of dress was adopted in the eleventh century from the
Croats who entered the French service. Towards the end of the eighteenth
and the beginning of the nineteenth century the cravat attained an
incredible degree of extravagance, but common sense at last brought in
the simpler style of neckties that has since prevailed.
How does the Gas Meter Measure Your Gas?
The quantity of gas used by each consumer is measured by an instrument
called a meter, of which there are two classes--the wet and the dry.
The wet meter is composed of an outer box about three-fifths filled with
water. Within this is a revolving four-chambered drum, each chamber
being capable of containing a definite quantity of gas, which is
admitted through a pipe in the center of the meter, and, owing to the
arrangement of the partitions of the chambers, causes the drum to
maintain a constant revolution. This sets in motion a train of wheels
carrying the hands over the dials which mark the quantity of gas
consumed.
The dry meter consists of two or three chambers, each divided by a
flexible partition or diaphragm, by the motion of which the capacity on
one side is diminished while that on the other is increased. By means of
slide valves, like those of a steam engine, worked by the movement of
the diaphragms, the gas to be measured passes alternately in and out of
each space. The contractions and expansions set in motion the clockwork
which marks the rate of consumption. The diaphragms in all the chambers
are so connected that they move in concert.
What is a Game Preserve?
Game preserves have only been introduced comparatively recently in the
United States, for the hunting grounds have been freely open to the
hunter, but they have been common in Britain and other countries of
Europe for centuries.
Their purpose here is the preservation and increase of wild animals
instead of their destruction.
Deer parks have long been kept in this country, but the first systematic
attempt to foster wild game was made about 1860 by Judge J. D. Caton in
a park of Ottawa, Ill.
Chief among those that followed on a large scale is the great game park
of Austin Corbin, near Newport, N. H., an enclosure of 36,000 acres, in
which a wire fence eight feet high encloses an oblong tract twelve by
five miles, through which passes a mountain range 3,000 feet high.
American game of all kinds are kept here, from buffalo, elk, and moose
to the smaller and more timid varieties, and there has been a rapid
increase.
Public-domain text, read in full here on John Shaqi.
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