and a sure guarantee to its sterling
value, and those who have read Dr. Dick's former works will need
no recommendation of this book by us. He is not only an original
and profound observer of nature, but truly a most excellent
_Christian_ philosopher, whose powers of intellect and expanded
views of the character of the great Architect of the universe are so
eminently calculated to direct the mind not alone to the grandeur,
the magnificence, and sublimity of the laws and principles of the
material world, but to look through nature up to "Nature's God." It
is truly a valuable work.--_Farmer and Mechanic._

The merits of this work are of the highest order; Dick is one of the
profoundest and purest of modern philosophers.--_Western Continent._

Here is the ninth volume presented by this gifted author to the public;
the aim of all of which has been to simplify sciences which before
have been too often considered as every way _above_, and therefore
unworthy of the attention of ordinary readers. It is specially
addressed to private students and the higher schools, and comprises
a large amount of new and valuable matter connected with astronomy,
and pointing out ways in which the more humble student can in the
best way improve the advantages placed in his way.--_Auburn Journal._

Let not the inquisitive fear that the intricacies of science or
the technicalities of language will obstruct the pleasure they
will derive from the study of this book; for the clearness of the
author's style, and the elucidation of the one hundred engravings,
render it within the scope and comprehension of every intelligent
student.--_Industrial Record._

The copious use of engravings and of pictorial illustrations,
together with the plain, popular explanations, render this book a
truly _practical_ work. Dr. Dick is not only thoroughly scientific,
but he knows well how to render his acquisitions available to the
great body of common readers, by his accurate method and clear
descriptions.--_Watchman._

We have always been an admirer of the writings of this gentleman, and
popularity keeps on his side wherever he is known. He is a profound
thinker and a devout Christian. His works all tend to illustrate
the simple as well as the sublimest principles of philosophy, and
while they instruct, can not fail to enlighten. The present volume
comprises illustrations of light and colors, practical descriptions of
all kinds of telescopes, the use of the equato