PROCEEDINGS of the TWENTIETH MEETING, at Edinburgh, 

 1850. Published at I5s. 



Contents : — R. Mallet, First Report on the Facts of Earthquake Pha;nomena; — Rev. Prof. 

 Powell, on Observations of Luminous Meteors ; — Dr. T. V/illiams, on the Structure and 

 History of the British Annelida; — T. C. Hunt, Results of Meteorological Observations taken 

 at St. Michael's from the 1st of January, 1840 to the 31st of December, 1849 ; — R. Hunt, on 

 the present State of our Knowledge of the Chemical Action of the Solar Radiations ; — Tenth 

 Report of Committee on Experiments on the Growth and Vitality of Seeds ; — Major-Gen. 

 Briggs, Report on the Aboriginal Tribes of India ; — F. Ronalds, Report concerning the Ob- 

 servatory of the British Association at Kew ;— E. Forbes, Report on the Investigation of British 

 Marine Zoology by means of the Dredge ; — R. MacAndrew, Notes on the Distribution and 

 Range in depth of Mollusca and other Marine Animals, observed on the coasts of Spain, Por- 

 tugal, Barbary, Malta, and Southern Italy in 1849; — Prof. AUman, on the Present State of 

 our Knowledge of the Freshwater Polyzoa ; — Registration of the Periodical Phaenomena 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 Recom- 

 mendations of the Association and its Committees. 



PROCEEDINGS of the TWENTY-FIRST MEETING, at Ipswich, 

 1851, Published at 16s. 6d. 



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

 port of Committee on Experiments on the Growth and Vitality of Seeds ; — Dr. J. Drew, on 

 the Climate of Southampton ; — Dr. 11. 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 CEconomical and Physical Point of View of the Destruction of Tro- 

 pical Forests ; — A. Henfrey, on the Reproduction 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 Phaenomena ; — Letter from Prof. Henry, to Col. Sabine, on the System of Meteoro- 

 logical 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 Magneto- 

 graphs during the Experimenial Trial at the Kew Observatory; — F. Ronalds, Report concern- 

 ing the Observatory of the British Association at Kew, from September 12 1850, to July 31, 

 1851 ; — Ordnance Survey of Scotland. 



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

 mendations of the Association and its Committees. 



PROCEEDINGS of the TWENTY-SECOND MEETING, at Bel- 

 fast, 1852, Published at \5s. 



Contents : — R. Mallet, Third Report on the Facts of Earthquake Phaenomena; — 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 In- 

 fluence 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 Sta- 

 tions 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 Oiconomy 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; — J. Thomson, on the Vortex- Water- 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 Recom- 

 mendations of the Association and its Committees. 



