...Illustrations. $1.50. 33. ILLUSIONS: A Psychological Study. By JAKES SULLY. $1.50. 34. THE SUN. By CA YODNO, Professor of Astronomy in the College of New Jersey. With numerous Illustrations. $2.00. 85. VOLCANOES: What they Are and what they Teach. By Jons W. JUDD, FRS, Professor of Geology...

...Illustrations. $1.50. 33. ILLUSIONS: A Psychological Study. By JAMES SULLY. $1.50. 34. THE SUN. By CA YODNG, Professor of Astronomy in the College of New Jersey. With numerous Illustrations. $2.00. 85. VOLCANOES : What they Are and what they Teach. By JOHN W. JUDD, FRS, Professor of Geology...

...Illustrations. $1.50. 88. ILLUSIONS : A Psychological Study. By JAMBS SULLY. $1.50. 84. THE SUN. By CA YOUNG, Professor of Astronomy in the College of New Jersey. With numerous Illustrations. $2.00. 85. VOLCANOES : What they Are and what they Teach. By JOHN W. JUDD, FRS, Professor of Geology...

...Illustrations. $1.50. 33. ILLUSIONS : A Psychological Study. By JAMES SULLY. $1.50. 34. THE SUN. By CA YOUNG, Professor of Astronomy in the College of New Jersey. With numerous Illustrations. $2.00. 85. VOLCANOES : What they Are and what they Teach. By JOHN W. JUDD, FRS, Professor of Geology...

..." Leveling and Higher Surveying," are now revised and united in this volume. THE SUN. By CA YOUNG, Ph. D., LL. D., Professor of Astronomy in the College...Jersey. With numerous Illustrations. Third edition, revised, with Supplementary Note. Vol. 84 of " The International Scientific Series." 12mo, cloth, $2.00....

...and "Leveling and Higher Surveying," are now revised and united in this volume. THE SUN. By CA YOUNG, Ph. D., LL D., Professor of Astronomy in the College...Jersey. With numerous Illustrations. Third edition, revised, with Supplementary Note. Vol. 34 of " The International Scientific Series." 12mo, cloth, $2.00....

...$8.50. The two vohim '9 previously pnh'i?he<t, "Land Snrveyirg" and "Leveling TIIE SUN. By CA YOCNO, Ph. D., LL. D., Professor of Astronomy in the College...Jersey. With numerous Illustrations. Third edition, revised, with Supplementary Note. Vol. 34 of " The International Scientific Series." 12mo, cloth, £2.00....

...and "Leveling and Higher Surveying," are now revised and united in this volume. THE SUN. By CA Yorao, Ph. D., LL. D., Professor of Astronomy in the College of New Jersey. With numerous lllustrations. Third edition, revised, with Supplementary Note. Vol. 34 of " The International Scientific...

...volcanic phenomena •re associated."— Popular Science Monthly. THE SUIf. By CA YOUNG, Ph. D., IX. D., Professor of Astronomy in the College of New Jersey. With numerous Illustrations. Third edition, revised, with Supplementary Note. 12mo. Cloth, $2.00. The " Supplementary Note " gives important developments...

...the publication of the second edition, in 1882, bringing the subject to date as lar as possible. " Professor Young; is an authority on 'The Sun.' and writes from intimate knowledge. He has sturiied tbat great, luminary all his life, invented and improved instruments for observing it, gone...