PROCEEDINGS or rus TWENTIETH MEETING, at Edinburgh, 
1850, Published at 15s. 
ConTENnTs:—Robert Mallet, First Report on the Facts of Earthquake Phenomena;—Rev. 
B. Powell, on Observations on Luminous Meteors ;—Thomas Williams, on the Structure and 
History of the British Annelida;—T. C. Hunt, Results of Meteorological Observations taken 
at St. Michael’s from the Ist 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 a Committee appointed to continue their Experiments on the Growth and Vitality 
of Seeds ;—Major-Gen. Briggs, Report on the Aboriginal Tribes of India ;—Francis lonalds, 
Report concerning the Observatory of the British Association at Kew;—Edward Forbes, Report 
on the Investigation of British Marine Zoology by means of the Dredge;—Robert MacAndrew, 
Notes on the Distribution and Range in depth of Mollusca and other Marine Animals, ob- 
served on the coasts of Spain, Portugal, Barbary, Malta, and Southern Italy in 1849 ;—Prof. 
Allman, 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 Ob- 
seryation 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 or rue TWENTY-FIRST MEETING, at Ipswich, 
1851, Published at 16s. 6d. 
ConTENTS :—Revy. B. Powell, on Observations of Luminous Meteors;—Eleyenth Report 
of a Committee appointed to continue their Experiments on the Growth and Vitality of 
Seeds ;—J. Drew, Remarks on the Climate of Southampton, founded on Barometrical, Ther- 
mometrical and Hygrometrical Tables, deduced from Observations taken three times daily 
during the years 1848, 1849 and 1850 ;—Dr. R. A. Smith, on the Air and Water of Towns, 
Action of Porous Strata, Water and Organic Matter ;—Report of the Committee appointed by 
the British Association to consider the probable Effects in an Economical and Physical Point 
of View of the Destruction of Tropical Forests ;—A. Henfrey, on the Reproduction and 
supposed Existence of Sexual Organs in the Higher Cryptogamous Plants ;—Dr, Daubeny, 
on the Nomenclature of Organic Compounds ;—Rev. J. W. Donaldson, on two unsolved 
Problems in Indo-German Philology ;—T. Williams, Report on the British Annelida;—Robert 
Mallet, Second Report on the Facts of Earthquake Phenomena ;—Letter from Prof. Henry, 
Secretary of the Smithsonian Institution at Washington, to Col. Sabine, General Secretary of 
the British Association, on the System of Meteorological Observations proposed to be 
established in the United States;—Col. Sabine, Report on the Kew Magnetographs;—J. 
Welsh, Report to F. Ronalds, on-the Performance of his three Magnetographs during the Ex- 
perimental Trial at the Kew Observatory, April 1 till October 1, 1851;—¥. Ronalds, Report 
coneerning the Observatory of the British Association at Kew, from September 12, 1850 to 
July 31, 1851 ;—Ordnance Survey of Scotland ;—Provisional Report. 
Together with the Transactions of the Sections, Professor Airy’s Address, and Recom- 
mendations ef the Association and its Committees. 

DOVE’S MONTHLY ISOTHERMAL MAPS of the GLOBE, with the accompanying 
Memoir, Price 5s. 
LITHOGRAPHED SIGNATURES of the MEMBERS who met at Cambridge in 1888, 
with the Proceedings of the Public Meetings, 4to. Price 4s. (To Members, 3s.) 


