HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 37, PICCADILLY, W. 253 



4970 TYNDALL (John, F.R.S.) On the ABSORPTION and RADIATION of HEAT by GASES and 

 VAPOURS, and on the Physical Connexion of Radiation. Absorption, and Conduction, plate 

 (pp. 39) : On the ABSORPTION and RADIATION of HEAT by GASEOUS MATTER : Second Memoir, 

 plate (pp. 45) 2 parts 8vo. sewn (scarce), 5s Qd 1861-2 



'The power to absorb and the power to radiate Tyndall showed to be perfectly reciprocal. He also established that, 

 as regards their powers of absorption and radiation, liquids and their vapours respectively follow the same order.' D. N. B. 



4971 ADDRESS before the BRITISH ASSOCIATION at BELFAST, with Additions, 8vo. cl. (out of 



print), 2s Qd 1874 



The Apologia pro Fide sua, much mishandled in the name of Religion at the time. 



4972 ADDRESS to the MATHEMATICAL and PHYSICAL SCIENCE SECTION of the BRITISH 



ASSOCIATION, NORWICH, August 19, 1868, 8vo. (pp. 6), sewn, with author's inscr., 4s [1868] 



' Mrs. Griffith, presented by JOHN TYNDALL.' Inscr. on title. 



4973 _ COMPARATIVE VIEW of the CLEAVAGE of CRYSTALS and SLATE ROCKS, woodcut, 8vo. 

 (pp. 14), sewn, 2s Qd 1856 



The account of the author's discovery that pressure alone was enough to produce the cleavage of slate rocks. 



4974 CONTRIBUTIONS to MOLECULAR PHYSICS in the Domain of RADIANT HEAT : Memoirs 



from the * Philosophical Transactions ' and ' Philosophical Magazine ', with Additions, 2 folding 

 plates, and numerous woodcuts, 8vo. cl. (out of print), 9s (p. 16s) 1872 



' The astounding change in the deportment of matter towards heat radiated from an obscure source which accompanies 

 the act of chemical combination, and many other points of equal importance, were first established by these researches, 

 for which Tyndall received the Hum ford medal in 1869. They have been gathered together in Contributions to Molecular 

 Physics. This volume also includes a series of striking experiments on the decomposition of vapours by light, wherein 

 the blue of the firmament and the polarisation of sky-light were shown to be due to excessively fine particles floating in 

 our atmosphere.' D. N. B. 



4975 ESSAYS on the FLOATING MATTER of the AIR, in relation to PUTREFACTION and 



INFECTION, woodcuts, post 8vo. cl., 3s Qd (p. 7s Qd) 1881 



Including the author's ingenious experiments to discover bacteria in the air by optical means. It gave the first 

 impetus to the popularisation of the Germ Theory which has helped so much to make life interesting to the idle rich. 



4976 - - EXPERIMENTS on the VIBRATIONS of STRINGS, 8vo. (pp. 9), sewn, Is 1866 



FARADAY as a DISCOVERER v. Nos. 1302-4, ante. 



4977 - The FORMS of WATER in CLOUDS and RIVERS, ICE and GLACIERS, new Ed., with fine 

 front., and 34 other woodcuts, post 8vo. cl., 2s Qd (p. 5s) 1872, '3, '8, or 85 



4978 - FRAGMENTS of SCIENCE for UNSCIENTIFIC PEOPLE: a Series of detached Essays, 

 Lectures, and Reviews, first edition, with woodcuts, 8vo. cl., 4s (p. 14s) 1871 



Including interesting sketches of Faraday. 



4979 THIRD EDITION [unaltered], 8vo. cl. (cheap copy), 3s (p. 14s) 1871 



49SO - - FOURTH EDITION [enlarged], with woodcuts, 8vo. cl., 6s (p. 14s) 1872 



This edition contains his views on the relation between science and theology, which gave cause to a keen controversy ; 

 also an interesting new preface (pp. 14). and several new articles, viz., On the Physical Basis of Solar Chemistry ; On 

 Force ; and the Copley Medalists of 1870 and 1871 [James Prescot Joule, and Julius Robert v. Mayer]. 



4981 - SIXTH EDITION [enlarged and rewritten], with woodcuts and map, 2 vols. post 8vo. cl. 

 (cheap copy), 7s 6d (p. 16s) 1879 



4982 EIGHTH EDITION, with woodcuts, and map, 2 vols. post 8vo. cl., 9s Qd (p. 16s) 1892 



* In this edition the article ' On Dust and Disease ' has been left out, and one on ' The Sky ' added in its stead, and one, 

 ' The Scientific Use of Imagination', modified. 



4983 - - HEAT considered as a MODE of MOTION : twelve Lectures at the Royal Institution, 1862, 

 first edition, with folding plate, and 100 woodcuts, post 8vo. cl., or, hf. calf, 3s6rf(p. 12s 60?) 1863 



4984 - SECOND EDITION, with Additions, plate, and 101 woodcuts, post 8vo. cl., 3s Qd (p. 12s Qd) 



1865 

 4985 ANOTHER COPY, hf. calf gilt, 4s 



4986 - - THIRD EDITION, with Additions, plate, and 108 woodcuts, post 8vo. cl., 4s (p. 12s Qd) 1868 



4987 - FOURTH EDITION, with folding plate, and 109 woodcuts, thick post 8vo. cl., 5s 1870 



This edition contains ' some account of my recent researches on the chemical reactions of light, considered from a 

 dynamical point of view '. Preface. It also includes an explanation of the blue of the sky, and of the polarisation of its 

 light, as well as an hypothesis regarding the constitution of comets, and remarks on the polarisation of heat. 

 49S8 - - FIFTH EDITION [enlarged] , with plate, and 108 woodcuts, post 8vo. cl., 5s (p. 10s Qd) 1875 



This edition contains a new chapter, and concluding additions; an article 'On Singing Flames' however, contained iu 

 the 3rd and 4th editions, is left out. 



4989 - - EIGHTH [FINAL] EDITION, with front, and 125 woodcuts, post 8vo. cl., 7s (p. 12s) 1890 



Containing three new chapters, including ' The Labours of Mayer.' 



'In this work, which has been regarded as the best of Tyndall's books, that difficult subject was for the first time 

 presented in a popular form.' D. N. B. 



4990 LESSONS in ELECTRICITY at the Royal Institution, 1875-6, with 58 woodcuts, post 8vo. cl., 



Is Qd 1876 



4991 - - La MATIERE et la FORCE: La Force: deux Conferences traduites par I'ABBE F. N. M. 

 MoiGNO, Ed. revue, post 8vo. sewn (out of print), Is Qd 1873 



4992 - NEW FRAGMENTS [of SCIENCE], post 8vo. cl., 5s 6d (p. 10s Qd) 1892 



4993 - ANOTHER COPY, hf. green calf extra, uncut, t. e. g. (nice copy), 7s Qd 



4994 NOTES of Lectures at the Royal Institution on ELECTRICAL PHENOMENA and THEORIES, 



1870, new Ed., post 8vo. cl., Is Qd 1873 



4995 - NOTES of Lectures at the Royal Institution on LIGHT, 1869, post 8vo. sewn, Is 1871, or '9 



4996 - ANOTHER COPY, cl., Is Qd 1870, or '5 



4997 RESEARCHES on DIAMAGNETISM and MAGNE-CRYSTALLIC ACTION, including the Question 



of DIAMAGNETIC POLARITY, first edition, with 10 plates, and numerous woodcuts, 8vo. cl., Qs Qd 

 (p. 14s) 1870 



' He showed that the antithesis of the two forces was absolute : diamagnetism resembling magnetism as to polarity and 

 all other characteristics, differing only by the substitution of repulsion for attraction and vice versa \D. N. B. 

 The above edition is the best, several papers having been left out in the later ones. 



