ennial
rivers, and thus promote navigation. Mountains are the largest source of
water-power, which is more valuable than ever now that electricity is
employed to transmit it to convenient centers for use in the industries. A
large part of the mining machinery in the United States is run by water
power. Switzerland, which has no coal, turns the wheels of its mills with
water. Mountains supply most of the metals and minerals, and are therefore
the scene of the largest mining industry. They are also among the greatest
sources of forest wealth. Though the slopes are not favorable for
agriculture they afford good pasturage, and the debris of the rocks washed
into the valleys and plains by mountain torrents supplies good soil. Thus
the Appalachians have been worn down to a comparatively low level, and the
soil formed from their rock particles is the basis of large husbandry.
The scenic attractions of many mountain regions is a source of large
revenue. The Alps attract crowds of tourists, who spend about twenty
million dollars a year in Switzerland and Austria, and give to many
thousands of persons.

--Adams: _Commercial Geography_.

OUTLINE (to be completed)

Mountain ranges have great influence upon--
I. Climate.
Why?
Where?
_a, b,_ etc.
II. Political geography.
Why?
Where?
_a, b,_ etc.
III. Commerce.
Why?
Where?
_a, b,_ etc.

_B._ Make an outline of the following paragraph:--

1. The armor of the different classes was also accurately ordered by the
law. The first class was ordered to wear for the defense of the body,
brazen helmets, shields, and coats of mail, and to bear spears and swords,
excepting the mechanics, who were to carry the necessary military engines
and to serve without arms. The members of the second class, excepting that
they had bucklers instead of shields and wore no coats of mail, were
permitted to bear the same armor and to carry the sword and spear. The
third class had the same armor as the second, excepting that they could
not wear greaves for the protection of their legs. The fourth had no arms
excepting a spear and a long javelin. The fifth merely carried slings and
stones for use in them. To this class belonged the trumpeters and horn
blowers.

--Gilman: _Story of Rome_.

_C._ In preparing your other lessons for to-day, make outlines of the
paragraphs.

+Theme XIX.+--_Reproduce the thought of