Platt

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Flatyhelmintties

comes for Plato the ultimate ground and in-
terpretation of all reality, and the aim of all
science would be attained in so f.ir as \ve
could rise to the knowledge of this supreme
good, and see everything in the light ot it.
And it is in virtue of this twofold conviction
that the truest realities are not those re-
vealed by the senses, and that through all
reality a single purpose or meaning runs, thai
Platonism has ever been the type of an ideal-
istic philosophy.

Platt, Charles Adams (1861-1933), Am-
erican painter, etcher, architect, and land-
scape architect, was born in New York City,
and studied art at the National Academy
school and at the Art Students' League in
that city, continuing in Paris. His landscapes
include Early Spring (1884), Clouds (1894),
and Snow (1900). He was an early member
of the N. Y. Etching Club, and devoted much
attention to the art, notable specimens of his
work being The Market Slip, Low Tide, St.
John, N. B., On the Connecticut River, and
many Dutch scenes. In later years he gave
much attention to landscape architecture and
to architecture.

Platt, Orville Hitchcock (1827-1905),
American politician, born at Washington, Ct.
He was in the Connecticut Senate or House
from 1855 to 1869 and was U. S. senator
from 1879 until his death. He is best known
as the author of the so-called 'Platt Amend-
ment' which governed the relations between
Cuba and the United States, until it was
superseded in 1934 by independence for
Cuba.

Platt, Thomas Collier (1833-1910), Am-
erican politician, was born in Owego, N. Y.
In 1872 he went to New York City to start
a Republican newspaper. In 1878 he became
manager of the United States Express Com-
pany, and in 1879 its president. He served
two terms in Congress (1872-6), and in 1881
was chosen United States Senator but, with
Roscoe Conkling, resigned in May of that
year in protest against appointments in New
York by President Garficld, He gained com-
plete control of the Republican organization
in the State. He was United States Senator
(1897-1909).

Platte National Park. See National
Parks.

Platte River, or Nebraska River, right
branch of the Missouri, rises in Northern
Colorado in two forks, known as the North
and South Platte Rivers, which unite near
North Platte City, Neb. The main river flows
through Nebraska easterly through a broad

bottomland, to its junction with the Missouri
below Omaha. During mo> I of the 3rear the
main river is dry for .several hundred miles
through Nebraska. Tin- drainage area is 90,-
01 j sq. mill's; the length of the main stream
L, 315 miles; including the North Platte, 825
miles.

Platteville, city, Grant co., Wisconsin, Fea-
tures of interest include the State normal
school, city park, and the picturesque natural
scenery of the region and of the Platte River
valley. The chief commercial interests are in
the mining of lead and zinc. The city is also
a shipping point for cattle, hogs, and dairy
products; p.4,762.

Plattsburg, city, New York, county seat
of Clinton co., on the w, shore of Lake
Champlain at the mouth of the Saranac Riv-
er. The town is beautifully situated on Cum-
berland Bay, where the Battle of Plattsburg
was fought in 1814, and commands a fine
view of the Green Mountains and of the lake.
It has a State normal school, a public library,
and several philanthropic institutions. Not-
able buildings and features of interest are the
court house, custom house. City Hall, and
the historic Delord House, headquarters of
the British army commanders during the
Battle of Plattsburg. Plattsburg Barracks, a
United States military post, established in
18,38, is situated on the outskirts of the town.
It was the scat of a large military training
camp during World Wars I and II; p.
16,35:1.

Plattsburg, Battles of. During the Revo-
lutionary War a small American fleet under
Gen. Benedict Arnold was defeated Oct. TI,
1776, off Valcour Island, near the present site
of Plattsburg, by a superior fleet under Sir
Guy Carlelou. Though greatly shattered, the
American ships withdrew in good order, and
not a prisoner was taken. During the War of
1812 the town was the headquarters of the
American forces on the northeast frontier. In
September, 1814, a joint land and naval at-
tack was made by the British. After their de-
feat, the fleet retreated to Canada, and no
further attacks were made during the %var.

Platyhelminthes, or Flat-worms, a divi-
sion of the animal kingdom which contains
such important parasites as flukes or tre-
matodes, and tapeworms or ccstoda, as well
as planarians or turbcllarians. The platyhel-
minthes are bilaterally symmetrical animals,
with flattened bodies, which in the more
primitive forms are leaf-like. Platyhclminthes
are divided into three classes—(i) the Tur-
bellaria, which are free-living; (2) the Tre*