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PREFACE TO THE FIFTH SERIES.

About 5,500 persons attended the eight lectures which have been delivered this season, and the audiences exhibited the same interest and attention as they showed on former occasions.

It is to be understood that each lecturer is entirely responsible for the statements as they appear in print.

Again we all have to thank those who have by their kind contributions rendered a continuation of the lectures possible; and I have to acknowledge the services of our treasurer, Mr. Thos. Harrison, and to express my regret at his retirement.

Fanuary, 1874.

H. E. ROSCOE.

PREFACE TO THE SIXTH SERIES.

THE attendance at the opening lecture, held in the Free Trade Hall, was about 3,700, whilst at each of the subsequent lectures it has averaged 675.

We are indebted to all the Lecturers of the season, and to Professor Tyndall and Sir John Lubbock in addition, for their contribution to our funds.

The following is a list of the Lectures which have been delivered :

CRYSTALLINE AND MOLECULAR FORCES. By Professor Tyndall, F.R.S. (President of the British Association).

JOHN DALTON. By Professor Roscoe, F.R.S.

ON THE TRANSIT OF VENUS. By Dr. Wm. Huggins, L.L.D., F.R.S.

JOSEPH PRIESTLEY: HIS LIFE AND CHEMICAL WORK. By Professor Thorpe, F.R.S.E.

GEOGRAPHICAL DISTRIBUTION OF MAMMALS. By P. L. Sclater, Esq., M. A.,
F.R.S. (Secretary to the Zoological Society).

EARTHQUAKES AND VOLCANOES. By Professor W. C. Williamson, F.R.S.
MODERN SAVAGES. By Sir John Lubbock, Bart., F.R.S., M.P.
PALESTINE EXPLORATION. Bv Major C. W. Wilson, R. E.

January, 1875.

E. H. ROSCOE

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