plan of its arrangement, this work surpasses
any other Grammar now before the public; and that in all respects it is
most admirably adapted to the use of schools and academies."

_From _JOHN M. WOLCOTT, A.M._, Principal and Superintendent of Ninth
Ward School, Pittsburg, Pa._

"Covell's Digest of English Grammar not only evinces the most unceasing
labor, the most extensive research, the most unrelaxing effort, and the
most devoted self-sacrificing study of its author, but it is the most
complete, the most perfect, and, to me, the most satisfactory
exposition of English Grammar that has come to my notice. It appears to
me that every youth aspiring to become master of the English language,
from the rudimental principles to the full, round, beautiful,
faultless, perfect period, will make this volume his '_vade mecum_.'"

* * * * *

Natural Philosophy:

EMBRACING THE MOST RECENT DISCOVERIES IN THE VARIOUS BRANCHES OF
PHYSICS, AND EXHIBITING THE APPLICATION OF SCIENTIFIC PRINCIPLES IN
EVERY-DAY LIFE. ACCOMPANIED WITH FULL DESCRIPTIONS OF EXPERIMENTS,
PRACTICAL EXERCISES, AND NUMEROUS ILLUSTRATIONS.

BY G. P. QUACKENBOS, A.M.

12mo. 450 pages. Price $1 25.

This book, which is illustrated in the most liberal manner, is equally
adapted for use with or without apparatus. It is distinguished

1. For its remarkable clearness.

2. For its fullness of illustration.

3. For its original method of dealing with difficulties.

4. For its correction of numerous errors heretofore unfortunately
stereotyped in School Philosophies.

5. For its explanation of scientific principles as they appear in
every-day life.

6. For its practical application of these principles in questions
presented for the pupil's solution.

7. For a signal perspicuity of arrangement. One thing being presented
at a time and everything in its proper place, the whole is impressed
without difficulty on the mind.

8. For the interest with which it invests the subject. From the outset,
the student is fascinated and filled with a desire to fathom the
wonders of the material world.

9. For the embodiment of all recent discoveries in the various
departments of philosophy. Instead of relying on the obsolete
authorities that have furnished the matter for many of our popular
school Phil