5 OCTOBER 1872, page 13

Letters To The Editor.

THE AGRICULTURAL LABOURER. [To ms EDITOR OF THE "SPECTATOR.") have read with deep interest the various letters on the Agricultural Labourers' movement which, with the character-......

A New Theory Of Volcanoes.

T HERE are few subjects less satisfactorily treated in scientific treatises than that which Humboldt calls the Reaction of the Earth's Interior. We find, not merely in the......