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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:

2227