(See Section 44.) In many cases no
further explanation is necessary.
The following paragraph illustrates this method of explanation:--
The lower portions of stream valleys which have sunk below sea level are
called _drowned valleys_. The lower St. Lawrence is perhaps the greatest
example of a drowned valley in the world, but many other rivers are in the
same condition. The old channel of the Hudson River may be traced upon the
sea bottom about 125 miles beyond its present mouth, and its valley is
drowned as far up as Troy, 150 miles. The sea extends up the Delaware
River to Trenton, and Chesapeake Bay with its many arms is the drowned
valleys of the Susquehanna and its former tributaries. Many of the most
famous harbors in the world, as San Francisco Bay, Puget Sound, the
estuaries of the Thames and the Mersey, and the Scottish firths, are
drowned valleys.
--Dryer: _Lessons in Physical Geography_.
+Theme XCII.+--_Develop one of the following topic statements into an
expository paragraph by use of examples:_--
1. Weather depends to a great extent upon winds.
2. Progress in civilization has been materially aided by the use of nails.
3. Habit is formed by the repetition of the same act.
4. Men become criminals by a gradual process.
5. Men's lives are affected by small things.
6. Defeat often proves to be real success.
(Have you made your meaning clear? Does your example really illustrate the
topic statement? Can you think of other illustrations?)
+166.
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