"There is scarcely any well-informed person who, if he has but the will, has not also the power to add something essential to the general stock of knowledge, if he will only observe regularly and methodically some particular class of facts which may most excite his attention, or which his situation may best enable him to study with effect." Sir John Herschell, "Study of Natural Philosophy." "All the Natural Sciences are particularly valuable, not only as supplying the mind with the most rich, various, and beautiful furniture, but as teaching people that most useful of all arts, how to use their eyes." Prof. J. S. Blackie, "Self Culture." "Happy, truly, is the Naturalist. He has no time for melan- choly dreams. The earth becomes to him transparent; everywhere he sees significances, harmonies, laws, chains of cause and effect endlessly interlinked, which draw him out of the narrow sphere of self-interest and self-pleasing, into a pure and wholesome region of solemn joy and wonder." Rev. C. Kingsley, "Glaucus." [Printed by W. H. and L. Collingridge, City press, 148 & 149, Aldersgate Street, London, E.C.]