THE NEW STUDENT'S REFERENCE WORK
(3) How rock fossils are made in the sedimentary rock:
(a) The fossils of plant-life: fossil
701; geology 749; paleontology 1409; evolution 638.
(b) The kinds of plants which are
shown: geology 749; fossil 701.
(c) The fossils of animal life which
are found: horse 886; geology 750; evolution 638.
(a) Luxuriant vegetation in marshes,
warm climate,
(b) Slight sinking of the land so as
to make a shallow sea.
(c) Deposit of sediment material on
the fallen vegetable growth.
(d) Increased pressure and heat to
change part of the vegetable material to coal.
(5) The stages In the making of coal: peat 1436; brown coal
1070; soft ©r bituminous and hard or anthracite coal 413. The making of soil:
f(a) Sandy soils: 1778; 1673.
(b) Clayey soils: 1778.
(c) Vegetable-soil: 1778; 16S6; 55.
(d) Mixtures of clay and sand with
vegetable matter to make sandy and clayey loam: 1165;
1QKQ• fiQS w AOOO, QUO.
(2) How the decay and disintegration of rock are brought about:
the work of water, frost, temperature and glaciers: 770; physiography 1483; Sahara Desert 1654.
2. STUDY OF THE ATMOSPHERE:
a. Its position in relation to the earth: 34.
b. Height to which the air extends: 34.
(1) How the height is known: aeronautics 18; barometer 174.
(2) Highest balloon ascensions: aeronautics 19; Gay-Lussac 741.
c. Pressure of the air on the surface of the earth — amount per square inch
or foot: 33.
d. The decreasing density of the air as we ascend: aeronautics 18; air 34;
barometer 174.
(1) Difference between density at base and tops of mountains: barometer 174,
e. The characteristics of the air:
(1) Tasteless, odorless, colorless, elastic; it has weight and is conrh
pressible: air 33; nitrogen 1353.
(2) Why we do not feel Its weight: 33.
'(1) Oxygen, which makes things burn and which, in breathing, we take from the air: its amount 1405; 739.
(2) Nitrogen, the work which It does
for us: the amount in the air 1353; 739.
(3) Carbonic acid gas, its relation to
animal and plant life: 332.
(4) Water-gas or vapor: 2051; evap-
oration 636; gas 739; barometer 174; clouds 412; natural gas 1306.
(4) The formation of coal: 413. (Study with reference to outline.)
(1) Kinds of soli:
f. Composition of air:
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