812 



PROCEEDINGS cf 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 by the alterations which 

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

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

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

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

 Eesearches ; — Eev. James Booth, on the Trigonometry of the Parabola, and the 

 Geotaetrical Origin of Logarithms ; — E. MacAndrew, Eeport on the Marine 

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

 physical conditions affecting their development ; — P. P. Carpenter, Eeport 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 EejDort on the Oyster Beds and 

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

 Eocks, 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 SpongiadiE ; — Eeport of a Committee upon the Experiments con- 

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

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

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

 gress in Eesearches on the Measurement of Water by Weir Boards ; — E. Mallet, on 

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

 Dynamics ; — Eeport 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 

 Eecommendations of the Association and its Committees. 



PROCEEDINGS of the TWENTY-SEVENTH MEETING, at 

 Dublin, 1857, Published at 15s. 



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

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

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

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

 ing and Eegistering 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 ; — Eobert Were Fox, Eeport on the Temperature of some Deep Mimes in Corn- 



wall; — Dr. G. Plarr, de quelqwes Transformations de la Somme 2' — — —I '~ 



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

 par une combinaison de factorielles, la notation a'\ + ' dt-signant le produit des 

 facteurs o (a+1) (a + 2) &c....(o-rf -1);— G. Dickie, M.D., Eeport 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 affected by the Constructive Type of 

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

 bank, Fiirther Report on the Vitality of the Spongiadaj ; — Dr. John P. Hodges, on 

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

 Great Britain ; — Eev. Baden Powell, Eeport on Observations of Luminous Meteors, 

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

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

 Simpson, Eesults 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, Eeport on the Improvement of Telescope and 

 Equatorial Moimtings ; — Prof. James Buckman, Eeport on the Experimental Plots 



