552 



PROCEEDINGS of the TWENTY- SIXTH MEETING, at Chel- 

 tenham, 1856, Published at 18s. 



Contents : — Eeport from the Committee appointed to investigate and report 

 upon the effects produced upon the Channels of the Mersey hy the alterations which 

 within the last iif ty years have been made in its Banks ; — J. Thomson, Interim 

 Eeport on progress in Kesearches on the Measurement of Water by Weir Boards ; — 

 Dredging Report, Frith of Clyde, 1856; — Bev. B. Powell, Report on Observations of 

 Luminous Meteors, 1855-1856 ; — Prof. Bunsen and Dr. H. E. Roscoe, Photochemical 

 Researches ; — Rev. James Booth, on the Trigonometry of the Parabola, and the 

 Geometrical Origin of Logarithms ; — R. MacAndrew, Report on the Marine 

 Testaceous Mollusca of the North-east Atlantic and neighbouring Seas, and the 

 physical conditions affecting their development ; — P. P. Carpenter, Report on the 

 present state of our knowledge with regard to the Mollusca of the West Coast of 

 North America; — T. C. Eyton, Abstract of First Report on the Oyster Beds and 

 Oysters of the British Shores ; — Prof. Phillips, Report on Cleavage, and Foliation in 

 Rocks, and on the Theoretical Explanations of these Phenomena, Part 1 ; — Dr. T. 

 Wright, on the Stratigraphical Distribution of the Oolitic Echinodermata ; — W. 

 Fairbairn, on the Tensile Strength of Wrought Iron at various Temperatures ; — C. 

 Atherton, on Mercantile Steam Transport Economy ; — J. S. Bowerbank, on the Vital 

 Powers of the Spongiadse ; — Report of a Committee upon the Experiments con- 

 ducted at Stormontfield, near Perth, for the artificial propagation of Salmon ; — Pro- 

 visional Report on the Measurement of Ships for Tonnage ; — On Typical Forms of 

 Minerals, Plants and Animals for Museums ; — J. Thomson, Interim Report on Pro- 

 gress in Researches on the Measurement of Water by Weir Boards ; — R. Mallet, on 

 Observations with the Seismometer ; — A. Cayley, on the Progress of Theoretical 

 Dynamics; — Report of a Committee appointed to consider the formation of a 

 Catalogue of Philosophical Memoirs. 



Together with the Transactions of the Sections, Dr. Daubeny's Address, and 

 Recommendations of the Association and its Committees. 



PROCEEDINGS op the TWENTY- SEVENTH MEETING, at 

 Dublin, 1857, Published at 15s. 



Contents : — A. Cayley, Report on the recent progress of Theoretical Dynamics ; 

 — Sixteenth and Final Report of Committee on Experiments on the Growth and 

 Vitality of Seeds ; — James Oldham, C.E., continuation of Report on Steam Navigation 

 at Hull ; — Report of a Committee on the Defects of the present methods of Measur- 

 ing and Registering the Tonnage of Shipping, as also of Marine Engine-Power, and' 

 to frame more perfect rules, in order that a correct and uniform principle may be 

 adopted to estimate the Actual Carrying Capabilities and Working-power of Steam 

 Ships ; — Robert Were Fox, Report on the Temperature of some Deep Mimes in Corn- 



wall ;— Dr. G. Plarr, de quelques Transformations de la Somme 2' -^ — r~l — r~; — i 



a etant entier negatif, et de quelques cas dans lesquels cette somme est exprimable 

 par line combinaison de factorielles, la notation a?\ + ' designant le produit des 

 facteurs a (a+1) (o + 2) &c. ...(o + i--l) ; — G. Dickie, M.D., Report on the Marine 

 Zoology of Strangford Lough, County Down, and corresponding part of the Irish 

 Channel ; — Charles Atherton, Suggestions for Statistical Inquiry into the Extent to 

 which Mercantile Steam Transport Economy is effected by the Constructive Type of 

 Shipping, as respects the Proportions of Length, Breadth, and Depth ; — J. S. Bower- 

 bank, Further Report on the Vitality of the Spongiadas ; — Dr. John P. Hodges, on 

 Flax ; — Major-General Sabine, Report of the Committee on the Magnetic Survey of 

 Great Britain ; — Rev. Baden Powell, Report on Observations of Luminous Meteors, 

 1856-57; — C. Vignoles, on the Adaptation of Suspension Bridges to sustain the 

 passage of Railway Trains; — Prof. W. A. Miller, on Electro-Chemistry ; — John 

 Simpson, Results of Thermometrical Observations made at the Plover's Wintering- 

 place, Point Barrow, latitude 71° 21' N, long. 156° 17' W., in 1852-54 ;— Charles 

 James Hargreave, on the Algebraic Couple ; and on the Equivalents of Indetermi- 

 nate Expressions ; — Thomas Grubb, Report on the Improvement of Telescope and 

 Equatorial Mountings ; — Prof. James Buckman, Report on the Experimental Plots 





