Part 18

Elementary Lessons in Astronomy. By J. NORMAN LOCKYER, F. R. S. Richly illustrated, and embracing the Latest Discoveries. American edition. Adapted to the Schools and Academies of the United States. 12mo. Cloth, $1.50.

Outlines of Astronomy. By Sir J. J. W. HERSCHEL. With Plates and Woodcuts. Eleventh edition. 8vo. Cloth, $4.00.

The Sun. By C. A. YOUNG, Ph. D., LL. D., Professor of Astronomy in the College of New Jersey. With numerous Illustrations. 12mo. Cloth, $2.00.

"Professor Young is an authority on 'The Sun,' and writes from intimate knowledge. He has studied that great luminary all his life, invented and improved instruments for observing it, gone to all quarters of the world in search of the best places and opportunities to watch it, and has contributed important discoveries that have extended our knowledge of it."--_Popular Science Monthly._

Spectrum Analysis, in its Application to Terrestrial Substances, and the Physical Constitution of the Heavenly Bodies. Familiarly explained by Dr. H. SCHELLEN, Director der Realschule I. O. Cologne. Translated from the second enlarged and revised German edition by JANE and CAROLINE LASSELL. Edited, with Notes, by WILLIAM HUGGINS, LL. D. With numerous Woodcuts, Colored Plates, and Portraits; also, Angström's and Kirchhoff's Maps. 8vo. Cloth, $6.00.

"This admirable work does credit to, or should we say is worthy of, the author, the translators, and the editor. The first part treats on the artificial sources of high degrees of heat and light; the second on Spectrum Analysis in its application to the heavenly bodies. We must approve the method followed in the translation and by the editor. In many translations the views of the author are suppressed, in order that the views of the translator or editor may be expounded; but here Dr. Huggins, however leniently such a fault might have been looked upon with him, has permitted the author's views to remain intact, clearly stating his own and wherein lies the difference."--_The Chemical News._

"Certainly, as regards mere knowledge, the 'Spectrum Analysis' has let us into many secrets of the physical universe which Newton and Laplace would have declared impossible for man's intellect to attain. The science is still in its infancy, but it is prosecuted by some of the ablest, most patient, and most enthusiastic observers, and some of the keenest thinkers, at present existing on our little, insignificant physical globe."--_Boston Globe._

Studies in Spectrum Analysis. By J. NORMAN LOCKYER, F. R. S., Correspondent of the Institute of France, etc. With Sixty Illustrations. 12mo. Cloth, $2.50.

"The study of spectrum analysis is one fraught with a peculiar fascination, and some of the author's experiments are exceedingly picturesque in their results. They are so lucidly described, too, that the reader keeps on, from page to page, never flagging in interest in the matter before him, nor putting down the book until the last page is reached."--_New York Evening Express._

Origin of the Stars, and the Causes of their Motions and their Light. By JACOB ENNIS. 12mo. Cloth, $2.00.

Astronomy and Geology Compared. By Lord ORMATHWAITE. 18mo. Tinted paper. Cloth, $1.00.

The Expanse of Heaven. A Series of Essays on the Wonders of the Firmament. By R. A. PROCTOR. 12mo. Cloth, $2.00.

"'The Expanse of Heaven' can not fail to be of immense use in forwarding the work of education, even when it is read only for amusement, so forcible is the impression it makes on the mind from the importance of the subjects treated of, while the manner of treatment is so good."--_Boston Traveller._

The Moon: Her Motions, Aspect, Scenery, and Physical Conditions, with Two Lunar Photographs and many Illustrations. By R. A. PROCTOR. New edition. 12mo. Cloth, $3.50.

Other Worlds than Ours; the Plurality of Worlds, studied under the Light of Recent Scientific Researches. By R. A. PROCTOR. With Illustrations, some colored. 12mo. Cloth, $2.50.

Our Place among Infinities. A Series of Essays contrasting our Little Abode in Space and Time with the Infinities around us. To which are added Essays on the Jewish Sabbath and Astrology. By R. A. PROCTOR. 12mo. Cloth, $1.75.

WORKS ON GEOLOGY, Etc.

Principles of Geology; or, The Modern Changes of the Earth and its Inhabitants, considered as illustrative of Geology. By Sir CHARLES LYELL, Bart. Illustrated with Maps, Plates, and Woodcuts. A new and entirely revised edition. 2 vols. Royal 8vo. Cloth, $8.00.

The "Principles of Geology" may be looked upon with pride, not only as a representative of English science, but as without a rival of its kind anywhere. Growing in fullness and accuracy with the growth of experience and observation in every region of the world, the work has incorporated with itself each established discovery, and has been modified by every hypothesis of value which has been brought to bear upon, or been evolved from, the most recent body of facts.

Text-Book of Geology, for Schools and Colleges. By H. ALLEYNE NICHOLSON, M. D. 12mo. Half roan, $1.30.

The Ancient Life-History of the Earth. A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science. By H. ALLEYNE NICHOLSON, M. D. With numerous Illustrations. Small 8vo. Cloth, $2.00.

Elements of Geology. A Text-Book for Colleges and for the General Reader. By JOSEPH LE CONTE, LL. D., Professor of Geology and Natural History in the University of California. With upward of 900 Illustrations. Revised and enlarged edition. 12mo. Cloth, $4.00.

Town Geology. By the Rev. CHARLES KINGSLEY, F. L. S., F. G. S., Canon of Chester. 12mo. Cloth, $1.50.

The Study of Rocks. An Elementary Text-Book in Petrology. With Illustrations. By FRANK RUTLEY, of the English Geological Survey. 16mo. Cloth, $1.75.

Great Ice Age, and its Relation to the Antiquity of Man. By JAMES GEIKIE. With Maps and Illustrations. 12mo. Cloth, $2.50.

Volcanoes: What they Are and what they Teach. By J. W. JUDD, Professor of Geology in the Royal School of Mines (London). With 96 Illustrations. 12mo. Cloth, $2.00.

Climate and Time in their Geological Relations: A Theory of Secular Changes of the Earth's Climate. By JAMES CROLL, of H. M. Geological Survey of Scotland. With Maps and Illustrations. 12mo. Cloth, $2.50.

Geology. By Professor ARCHIBALD GEIKIE, F. R. S. ("Science Primers.") 18mo. Flexible cloth, 45 cents.

_For sale by all booksellers; or sent by mail, post-paid, on receipt of price._

New York: D. APPLETON & CO., 1, 3, & 5 Bond Street.

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TRANSCRIBER'S NOTES

1. Passages in italics are surrounded by _underscores_.

2. Footnotes have been reindexed and moved from the end of the page to the closest paragraph break.

3. Certain words use oe ligature in the original.

4. Carat character (^) is used to indicate "raised to power". And the underscore character (_) is used to represent subscript.

5. The greek letter alpha is represented as [alpha] in this text.

6. A mixed fraction is indicated with a hyphen and forward slash. For example, 3-1/2 represents three and a half.

7. The following misprints have been corrected: "1/0000" corrected to "1/1000" (page 111) "strucure" corrected to "structure" (page 139) "fevric" corrected to "ferric" (page 141) "d'antorité" corrected to "d'autorité" (page 188) "resourses" corrected to "resources" (page 206)

8. Other than the corrections listed above, printer's inconsistencies in spelling, punctuation, and ligature usage have been retained.