PROCEEDINGS or tus SEVENTEENTH MEETING, at Oxford, 
1847, Published at 18s. 
ConTENTs :—Prof. Langberg, on the Specific Gravity of Sulphuric Acid at different de- 
grees of dilution, and on the relation which exists between the Development of Heat and the 
coincident contraction of Volume in Sulphuric Acid when mixed with Water:—R. Hunt, 
Researches on the Influence of the Solar Rays on the Growth of Plants ;—R. Mallet, on 
the Facts of Earthquake Phenomena ;—Prof. Nilsson, on the Primitive Inhabitants of Scan- 
dinavia ;—W. Hopkins, Report on the Geological Theories of Elevation and Earthquakes; 
—Dr. W. B. Carpenter, Report on the Microscopic Structure of Shells ;—Rev. W. Whewell and 
Sir James C. Ross, Report upon the Recommendation of an Expedition for the purpose of. 
completing our knowledge of the Tides ;—Dr. Schunck, on Colouring Matters ;—Seventh Re- 
port of the Committee on the Vitality of Seeds ;—J. Glynn, on the Turbine or Horizontal 
Water-Wheel of France and Germany ;—Dr. R. G. Latham, on the present state and recent 
progress of Ethnographical Philology ;—Dr. J. C. Prichard, on the various methods of Research 
which contribute to the Advancement of Ethnology, and of the relations of that Science to 
other branches of Knowledge ;—Dr. C. C. J. Bunsen, on the results of the recent Egyptian 
researches in reference to Asiatic and African Ethnology, and the Classification of Languages ; 
—Dr. C. Meyer, on the Importance of the Study of the Celtic Language as exhibited by the 
Modern Celtic Dialects still extant ;—Dr. Max Miiller, on the Relation of the Bengali to the. 
Arian and Aboriginal Languages of India;—W. R. Birt, Fourth Report on Atmospheric 
Waves ;—Prof. W. H. Dove, Temperature Tables; with Introductory Remarks by Lieut.-Col. 
E. Sabine ;—A. Erman and H. Petersen, Third Report on the Calculation of the Gaussian Con- 
stants for 1829. 
Together with the Transactions of the Sections, Sir Robert Harry Inglis’s Address, and 
Recommendations of the Association and its Committees. 
PROCEEDINGS or tue EIGHTEENTH MEETING, at Swansea, 
1848, Published at 9s. 
Contents :—Rev. Prof. Powell, A Catalogue of Observations of Luminous Meteors ;— 
J. Glynn on Water-pressure Engines ;—R. A. Smith, on the Air and Water of Towns ;—Eighth 
Report of Committee on the Growth and Vitality of Seeds ;—W. R. Birt, Fifth Report on At- 
mospheric Waves ;—E. Schunck, on Colouring Matters ;—J. P. Budd, on the advantageous use 
made of the gaseous escape from the Blast Furnaces at the Ystalyfera Iron Works;—R. Hunt, 
Report of progress in the investigation of the Action of Carbonic Acid on the Growth of 
Plants allied to those of the Coal Formations ;—Prof. H. W. Dove, Supplement to the Tem- 
perature Tables printed in the Report of the British Association for 1847 ;—Remarks by Prof. 
Dove on his recently constructed Maps of the Monthly Isothermal Lines of the Globe, and on 
some of the principal Conclusions in regard to Climatology deducible from them; with an in- 
troductory Notice by Lt.-Col. E. Sabine ;—Dr. Daubeny, on the progress of the investigation 
on the Influence of Carbonic Acid on the Growth of Ferns ;—J. Phillips, Notice of further 
progress in Anemometrical Researches ;—Mr. Mallet’s Letter to the Assistant-General Secre- 
tary;—A. Erman, Second Report on the Gaussian Constants ;—Report of a Committee 
relative to the expediency of recommending the continuance of the Toronto Magnetical and 
Meteorological Observatory until December 1850. 
Together with the Transactions of the Sections, the Marquis of Northampton’s Address, 
and Recommendations of the Association and its Committees. 
PROCEEDINGS or tut NINETEENTH MEETING, at Birmingham, 
1849, Published at 10s. : 
ConTENTS :—Rev. Prof. Powell, A Catalogue of Observations of Luminous Meteors ;—Earl 
of Rosse, Notice of Nebule lately observed in the Six-feet Reflector ;—Prof. Daubeny, on the 
Influence of Carbonic Acid Gas on the health of Plants, especially of those allied to the Fossil 
Remains found in the Coal Formation ;—Dr. Andrews, Report on the Heat of Combination ; 
—Report of the Committee on the Registration of the Periodic Phenomena of Plants and 
Animals;—Ninth Report of Committee on Experiments on the Growth and Vitality of Seeds ; 
—F. Ronalds, Report concerning the Observatory of the British Association at Kew, from 
Aug. 9, 1848 to Sept. 12, 1849 ;—R. Mallet, Report on the Experimental Inquiry on Railway 
Bar Corrosion ;—W. R. Birt, Report on the Discussion of the Electrical Observations at Kew. 
Together with the Transactions of the Sections, the Rev. T. R. Robinson’s Address, and 
Recommendations of the Association and its Committees. 
PROCEEDINGS or roe TWENTIETH MEETING, at Edinburgh, 
1850, Published at 15s. ees 
ConTENTS :—R. Mallet, First Report on the Facts of Earthquake Phenomena ;—Rev. Prof, 
Powell, on Observations of Luminous Meteors;—Dr. T. Williams, on the Structure and 
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