THOMAS H. HUXLEY’S WORKS. 11 vols., 12mo. Cloth, $18.00.
| Man’s Place in Nature. | $1 25 | Critiques and Addresses. | 1 50 |
| On the Origin of Species. | 1 00 | American Addresses. | 1 25 |
| More Criticisms on Darwin, and Administrative Nihilism. | 50 | Physiography. | 2 50 |
| A Manual of the Anatomy of Vertebrated Animals. Illus’d. | 2 50 | Elements of Physiology and Hygiene. By T. H. Huxley and W. J. Youmans. | 1 50 |
| A Manual of the Anatomy of Invertebrated Animals., Illus’d. | 2 50 | The Crayfish: An Introduction to Zoölogy. (International Scientific Series). | 1 75 |
| Lay Sermons, Addresses, and Reviews | 1 75 |
JOHN TYNDALL’S WORKS. 10 vols., 12mo. Cloth, $19.75.
| Heat as a Mode of Motion. | $2 00 | Hours of Exercise in the Alps. | 2 00 |
| On Sound. | 2 00 | Faraday as a Discoverer. | 1 00 |
| Fragments of Science. | 2 50 | On Forms of Water. | 1 50 |
| Light and Electricity. | 1 25 | Radiant Heat. | 5 00 |
| Lessons in Electricity. | 1 00 | Six Lectures on Light. | 1 50 |