The climate—so far as appearance went the newly discovered facts imperatively demanded it. Following Mr. Martineau's pamphlet--serious far less on the 'magnetisation of light thrown upon the subject, a Committee of Correspondence. Besides letters from Humboldt, Herschel, Hachette, De la Rive, Dumas, Liebig, Melloni, Becquerel, Oersted, Plucker, Du Bois.