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Works published by l). Appleton dc 6'0.



Being a Course of Twelve Lectures delivered before the
Royal Institution of Great Britain.


norassoa or NATURAL pmosornr IN run ROYAL msrxrurxox~aurnon at an
“enemas or run ALPS,” are.

With One Hundred Illustrations. 8vo, 480 pages. Price, $22.

From the American Journal of Science—Wuhan the skill which has
made Faraday the master of experimental science in Great Britain, Professor Tyndall
enjoys the advantage of a superior general culture, and is thus enabled to set ferth his
philosophy with all the graces of eloquence and the finish of superior diction. With a
simplicity, and absence of technicalities, which render his explanations lucid to un-
scientific minds, and at the same time a thoroughness and originality by which he in-
structs the most learned, he unfolds all the modern philosophy of heat. His work takes
rank at once as a classic upon the Subject.

New York Times.—Professor Tyndall’s course of lectures on heat is one of the
most beautiful illustrations of a mode of handling scientific subjects, which is com-
paratively new, and which promises the best results, both to science and to literature
generally; we mean the treatment of subjects in a style at once profound and papa-
lar. The title of Professor Tyndall’s work indicates the theory of heat held by him,
and indeed the only one now held by scientific men—it is a mode of motion.

Boston J ournal.—He exhibits the curious and beautiful workings of nature in
a most delightful manner. Before the reader particles of water lock themselves or fly
asunder with a movement regulated like a dance. They form themselves into liquid
flowers with fine serrated petals, or into rosettes Of frozen gauze; they bound upward
in boiling fountains, or creep slowly onward in stupendous glaciers. Flames burst into
music and sing, or cease to sing, as the experimenter pleases, and metals paint themo
selves upon a screen in dazzling hues as the painter touches his canvas.

New York Tribune.—The most original and important contribution that has
yet been made to the theory and literature of thermotics.

Scientific American—The work is written in a charming style, and is the
most valuable contribution to scientific literature that has been published in many
years. It is the most popular exposition of the dynamical theory of heat that has yet
appeared. The old material theory of heat may be said to be defunct.

Louisville Democrat—This is one of the most delightful scientific works we
have ever met. The lectures are so full of life and spirit that we can almost imagine
the lecturer before us, and see his brilliant experiments in every stage of their progress.
The theory is so carefully and. thoroughly explained that no one can fail to understand
it. Such books as these create a love for science.

Ifidependent.—Professor Tyndall’s expositions and experiments are remarkably
thoughtful, ingenious, clear, and convincing; portions of the book have almost the
interest of a romance, so startling are the descriptions and elucidations.

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