Guy's Hospital.

FROM THE THIRD LONDON EDITION.

In one neat volume.

"By the appearance of Dr. Bird's work, the student has now all that he
can desire in one neat, concise, and well-digested volume. The
elements of natural philosophy are explained in very simple language,
and illustrated by numerous wood-cuts."--_Medical Gazette._

"A volume of useful and beautiful instruction for the
young."--_Literary Gazette._

"We should like to know that Dr. Bird's book was associated with every
boys' and girls' school throughout the kingdom."--_Medical Gazette._

"This work marks an advance which has long been wanting in our system
of instruction. Mr. Bird has succeeded in producing an elementary work
of great merit."--_Athenaeum._

* * * * *

HERSCHELL'S ASTRONOMY.

A TREATISE ON ASTRONOMY,
BY SIR JOHN F. W. HERSCHELL, F. R. S., &c.

WITH NUMEROUS PLATES AND WOOD-CUTS.

A NEW EDITION, WITH A PREFACE AND A SERIES OF QUESTIONS,
BY S. C. WALKER.

In one volume, 12mo.

* * * * *

BREWSTER'S OPTICS.

ELEMENTS OF OPTICS,
BY SIR DAVID BREWSTER.

WITH NOTES AND ADDITIONS, BY A. D. BACHE, LL.D.
Superintendent of the Coast Survey, &c.

In one volume, 12mo., with numerous wood-cuts.

* * * * *

MULLER'S PHYSICS AND METEOROLOGY.

NOW READY.

PRINCIPLES OF PHYSICS AND METEOROLOGY,

BY J. MULLER,

Professor of Physics at the University of Freiburg.

ILLUSTRATED WITH NEARLY FIVE HUNDRED AND FIFTY ENGRAVINGS ON
WOOD, AND TWO COLORED PLATES.

In one octavo volume.

TRANSLATOR'S PREFACE.

In laying the following pages before the public, it seems
necessary to state that the design of them is to render more
easily accessible a greater portion of the general principles
of Physics and Meteorology than is usually to be obtained,
without the sacrifice of a greater amount of time and labour
than most persons can afford, or are willing to make. The
subjects of which this volume treats are very numerous--more
numerous, in fact, than at first sight it would seem possible
to embrace in so small a compass. The Author has, however, by
a system of the most judicious selection and condensation,
been enabled to introduce all the most important facts and
theories relating to Statics, Hydrostatics, Dynamics,