740 



and itange in depth of Mollusca and other Marine Animals, observed on the coasts 

 of Spain, Portugal, Barbary, Malta, and Southern Italy in 1849 ;— Prof. Allrnan, on 

 the Present State of our Knowledge of the Freshwater Polyzoa ;— Registration of 

 the Periodical Phenomena of Plants and Animals ; — Suggestions to Astronomers for 

 the Observation of the Total Eclipse of the Sun on July 28, 1851. 



Together with the Transactions of the Sections, Sir David Brewster's Address, 

 and Recommendations of the Association and its Committees. 



• 



PROCEEDINGS of the TWENTY-FIRST MEETING, at Ipswicli, 

 1851, Published at 16s. Qd. 



Contents : — Rev. Prof. Powell, on Observations of Luminous Meteors ; — 

 Eleventh Report of Committee on Experiments on the Growth and Vitality of 

 Seeds ; — Dr. J. Drew, on the Climate of Southampton ; — Dr. R. A. Smith, on the 

 Air and Water of Towns: Action of Porous Strata, Water, and Organic Matter; — 

 Report of the Committee appointed to consider the probable Effects in an Econo- 

 mical and Physical Point of View of the Destruction of Tropical Forests ;— A. 

 Henfrey, on the Reproduct on and supposed Existence of Sexual Organs in the 

 Higher Cryptogamous Plants ; — Dr. Daubeny, on the Nomenclature of Organic Com- 

 pounds ;— Rev. Dr. Donaldson, on two unsolved Problems in Indo-German Philology ; 

 —Dr. T. Williams, Report on the British Annelida ;— R. Mallet, Second Report on 

 the Facts of Earthquake Phenomena ;— Letter from Prof. Henry to Col. Sabine, on " 

 the System of Meteorological Observations proposed to be established in the United 

 States ;— Col. Sabine, Report on the Kew Magnetographs ;— J. Welsh, Report on the 

 Performance of his three Magnetographs during the Experimental Trial at the Kew 

 Observatory ;— F. Ronalds, Report concerning the Observatory of the British 

 Association at Kew, from September 12, 1850, to JHily 31, 1851 ;— Ordnance Survey 

 of Scotland. 



Together with the Transactions of the Sections, Prof. Airy's Address, and Recom- 

 mendations of the Association and its Committees. 



PROCEEDINGS of the TWENTY-SECOND MEETING, at Belfast, 



1852, Published at 15s. 



Contents :— R. Mallet, Third Report on the Facts of Earthquake Phenomena ;— 

 Twelfth Report of Committee on Experiments on the Growth and Vitality of Seeds; 

 —Rev. Prof. Powell, Report on Observations of Luminous Meteors, 1851-52;— Dr. 

 Gladstone, on the Influence of the Solar Radiations on the Vital Powers of Plants ; 

 — A Manual of Ethnological Inquiry ;— Col. Sykes, Mean Temperature of the Day, 

 and Monthly Fall of Rain at 127 Stations under the Bengal Presidency ;— Prof . J. 

 D. Forbes, on Experiments on the Laws of the Conduction of Heat ; — R. Hunt, on 

 the Chemical Action of the Solar Radiations ;— Dr. Hodges, on the Composition and 

 Economy of the Flax Plant;— W. Thompson, on the Freshwater Fishes of Ulster ;— 

 W. Thompson, Supplementary Report on the Fauna of Ireland ; — W. Wills, on the 

 Meteorology of Birmingham;—.!. Thomson, on the Vortex-Wat er- Wheel ; — J. B. 

 Lawes and Dr. Gilbert, on the Composition of Foods in relation to Respiration and 

 the Feeding of Animals. 



Together with the Transactions of the Sections, Colonel Sabine's Address, and 

 Recommendations of the Association and its Committees. 



PROCEEDINGS of the TWENTY-THIRD MEETING, at Hull, 



1853, Published at 10s. 6d. 



Contents: — Rev. Prof. Powell, Report on Observations of Luminous Meteors, 

 1852-53 ;— James Oldham, on the Physical Features of the H umber ; — James Old- 

 ham, on the Rise, Progress, and Present Position of Steam Navigation in Hull ; — 

 William Fairbairn, Experimental Researches to determine the Strength of Locomo- 

 tive Boilers, and the causes which lead to Explosion ;— J. J. Sylvester, Provisional 

 Report on the Theory of Determinants ;— Professor Hodges, M.D.. Report on the 

 Gases evolved in Steeping Flax, and on the Composition and Economy of the Flax 

 Plant ; — Thirteenth Report of Committee on Experiments on the Growth and 





