WORKS BY JOHN TYNDALL, D.C.L., LL.D., F.R.S. FRAGMENTS OF SCIENCE: a Series of Detached Essays, Addresses, and Reviews. 2 vols. Crown 8vo., 165.

Vol. I. The Constitution of Nature-Radiation-On Radiant Heat in Relation to the Colour and Chemical Constitution of Bodies-New Chemical Reactions produced by Light-On Dust and Disease-Voyage to Algeria to observe the Eclipse-NiagaraThe Parallel Roads of Glen Roy-Alpine Sculpture-Recent Experiments on FogSignals-On the Study of Physics-On Crystalline and Slaty Cleavage On Paramagnetic and Diamagnetic Forces-Physical Basis of Solar Chemistry-Elementary Magnetism-On Force-Contributions to Molecular Physics-Life and Letters of FARADAY-The Copley Medallist of 187c-The Copley Medallist of 1871-Death by Lightning-Science and the Spirits.

Vol. II. Reflections on Prayer and Natural Law-Miracles and Special Providences-On Prayer as a Form of Physical Energy-Vitality-Matter and Force-Scientific Materialism-An Address to Students-Scientific Use of the Imagination-The Belfast Address-Apology for the Belfast Address-The Rev. JAMES MARTINEAU and the Belfast Address-Fermentation, and its Bearings on Surgery and Medicine-Spontaneous Generation-Science and Man-Professor VIRCHOW and Evolution-The Electric Light.

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CONTENTS. The Sabbath-Goethe's Farbenlehre '-Atoms, Molecules, and Ether Waves -Count Rumford-Louis Pasteur, his Life and Labours-The Rainbow and its CongenersAddress delivered at the Birkbeck Institution on October 22, 1884-Thomas Young-Life in the Alps-About Common Water-Personal Recollections of Thomas Carlyle-On Unveiling the Statue of Thomas Carlyle-On the Origin, Propagation, and Prevention of Phthisis-Old Alpine Jottings-A Morning on Alp Lusgen.

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