SINOPSIS DEL LIBRO

Nature displays her wonders not only in the starry heavens or in the boundless variety of animal and vegetable life on the surface of our earth In the dark regions underground she likewise shows us much that is remarkable or beautiful or carries on gigantic operations which are sometimes beneficent and sometimes disastrous to mankind There lie concealed the mysterious laboratories of fire which reveal to us their existence in earthquakes and vol...Seguir leyendo