The Colfax chronicle., 1900-12-29

BODY. or the mass of a body. The
larger a body is the stronger the at
traction will he.
10. Gravitation gives weight to all
substances in nature.
Ii. The power OF Cohesion is SO
strong that it requires a pull of from
100000 to 10000 pounds to break a
steel bar one inch square.
IL. Cohesion acts only between
molecules Of the same kind Of matter:
while Adhesion acts only between
those Of different kinds of matter
IL. Matter In motion IL said to
have the power of doing work, or to
possess kinetic (active) energy. Often
the expenditure Of kinetic energy up-
ON body places 1t insuch a way that.
though 1t IL not in motion. it would
move and do work II unrestrained.
Such body is said to possess poten-
tential (possible) energy. A bent bow
or the wound-up spring Of a watch
possesses potential energy.
IA. The Solar System ia the sun |
ana the planets revolving around it.
10. The largest planets are, Mer-
curry. Venus, Earth, Mars, Jupiter,
Saturn, Uranus. and Neptune.
~. The earth is the planet upon
which we live. 1t Is fifth in point of
size, and third In point of distance
rom the sun. 1t has two motions:
one on Its axis, called rotation, which
causes day aud night. 1t makes
complete rotation In twenty -four
hours. Inc other motions: revolution
around the sun, which causes the sea-
sons. The earth makes a complete
In 365z days. or a year.
It is attended by a secondary hodv
called the moon, which reyolyes
about the earth as the earth reyolves
about the sun.
The earth Is nearly circular in form.
Il 1t were exactly round it would he =
'alied sphere, but as it is fat at the ,
)Oles 1t Is called q spheroid. The
'ause OF its Icing so. is owing TO CEN
rffugal force. The inertia Of all rO-
ating bodies gives them u tendency
% NY away from the center. Hence.
he earth bulges out at the equator
md draws in at the poles. The long
1T diameter Of theearth is Z, ,92s mikes.
ts circumference IL 5000 miles. Its t
Irea Is lJ7 ,UO0.0 QUO square miles. v
Ihe occurrence In different localities !,
4 hot. often boiling, springs, and the !.
OtejectiOns from volcanoes Indicates Z
nat the inside of theearth IL of a very z
Ugh temperature. The Temperature 8
{ ~ or ~ miles Is such that It will
leit any substan e. The earth il so y
ense that 1t weighs 5k times as much -
s all equal bulk OF water. n
H. The Vernal Equinox IL ON n
larch Il.
IL. The Atmosphere IL the outer =
Jvering OF the earth.
~, 1t IL composed Of a Hight and
HseOus substance. called air.
~. Clouds are mists or fOgs FORM ~
In the air near the earth's surface. - -
II. The mean heighth of clouds is "a u
bout a mile. The highest are about l
N miles. re
y. Clouds are divided into three "
eat Glasses: (l) Cirrus, (2) Cumulus, ,,' le
} Stratus. iIs
Z3. Dew differs from mist or fog In ~
'ing tiny water glObules condensed !"
ON the atmospheric vapOr, not in 70
Y air, but ON cool. solid Substances. ssy
=. All objects appear smaller when ~ ~
distance. Hence, the sun and "a
Don appear larger when near the
'rizOn because they can bc cumpar-
With objects ON this earth y surface.
%. The sun does not draw up wa
+. Thesunbeans, breaking through
ts In the clouds, are rendered visible n
I'm the illumined dust and air par
les in the path of the beams. When u
IL happens, some people say 1.-THE
q IL drawing up water.'
PLEDGE--l have neither given nor in
,eiyed any help ON this examination. aft
SOTE-The examination >of Miss acl
attic Cameron will be published =
xt week.