xxiv AUTHORS CONSULTED. 



HUTCHINSON . . . Extinct Monsters. 



HUMBOLDT .... Cosmos. 



HUTTON .... Theory of the Earth. 



HUXLEY . . . .On Priestley. Hume. Physiography. 



Elementary Physiology. Physical Basis 

 of Life. On Von Baer. Lectures on 

 the Elements of Comparative Anatomy. 

 On the Classification of Animals. 



JAMIN ..... Cours de Physique. 



JARDINE .... Naturalists' Library. 



JEVONS Principles of Science. 



JONES Examples of Physics. 



JOULE Mechanical Equivalent of Heat. 



KEILL . . . . . Introduction to Natural Philosophy. 

 KELLAND AND TAIT . . Introduction to Quaternions. 

 KlRCHHOFF .... Researches on the Solar Spectrum 



(Roscoe's Translation). 

 KNOX Permanence of Race Types. 



LAING . Problems of Modern Science. Modern 



Science and Modern Thought. Human 

 Origins. 



LAMARCK .... Philosophic Zoologique. 



LANKESTER .... The Advancement of Science. 



LAPLACE .... Theorie Analytique des Probability's. 



Systeme du Monde. Mecanique 

 Celeste. Essai Philosophique. 



LARDNER .... Cyclopaedia. 



LAVOISIER .... Elements of Chemistry. 



LECKY ..... History of Rationalism in Europe. 



LEWES Biographical History of Philosophy. Life 



of Aristotle. 



LEWIS, G. C. . . . Astronomy of the Ancients. 



LEWIS, J. C. ... Heroes of Science. 



LlEBlG . . . . . Letters on Chemistry. Introduction to 



the Analysis of Organic Bodies. 



LOCKE Essay Concerning Human Understanding. 



LOCKYER, N. Lessons in Elementary Astronomy. Solar 



Physics. The Chemistry of the Sun. 

 The Evolution of the Heavens and the 

 Earth. The Movements of the Earth. 

 Outlines of Physiography. The Me- 

 teoric Hypothesis. 



LUBBOCK .... Prehistoric Times. Scientific Lectures. 



Fifty Years of Science. Origin and 

 Metamorphosis of Insects. Ants, Bees, 

 and Wasps. 



