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Dredpring Report, FrUh of Clyde, 1856; Rev. B. Powell, Report on Observations of 

 riuminous Meteors, 1855-1850; -Prof, Bunsen and Dr. H. E. Roscoe, Photochemical 

 Researches ; — Kcv. James' Booth, on the Tripronometry of the Parabola, and the 

 (geometrical Origin of Loy^arithms ; — R. MacAndrew, Rejrart on the Marino 

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

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

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

 Xorth 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 tlie 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. I'owerbank, on the Vital 

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

 ducted at Stormontlield, near Perth, for tlie artificial propagation of Salmon ; — Pro- 

 visional R(!port on the INleasuremcnt 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. Caylcjy, on the Progress of Theoretical 

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

 Catalogue of Philosopliical Memoirs. 



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

 Recommendations of the Association and its Committees. 



PROCEEDINGS of tue TWENTr-SEVENTH MEETING, at 

 Dublin, 1857, Published at lbs. 



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, an^l 

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

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

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



-" a'\ + '/3'| -t- '5' +' 

 wall; — Dr. G. Plarr, de quelques Transformations de la Somme 2' ,~ — , ! , , , 



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

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

 facteurs a (a+1) (a-l-2) &.c....(a+t -1);— 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 affected by the Constructive Tj'pe of 

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

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

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

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

 1850-57; — C Vignoles, on the Adaptation of Suspension Bridges to sustain the 

 j)assage of Railway Trains ; — Prof. W. A. Miller, on Electro-Chemistry ; — Joliii 

 Simpson, Results of Thermometrical Observations made at the P/4irvr's Wintering- 

 place, Point Barrow, latitude 71° 21' N., long. 15G° 17' W., in 1852-54 ;—Charlc:^ 

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

 nate Expressions; — Tho'-"" Grubb, Report on the Improvement of Telescope and 

 Equatorial Mountings ;— Prof. James I'.uckman, Report on the Experimental Plots 

 in the Botanical Garden of the Royal Agricultural College at Cirencester; — William 

 Fairbairn, on the Resistance of Tubes to Collapse ; — George C. Hyndman, Report of 

 the Proceedings of the Belfast Dredging Committee ; — Peter W. Barlow, on thr 

 Mechanical Effect of combining Girders and Suspension Chains, and a Comparison 

 of the Weight of Metal in Ordinary and Suspension Girders, to produce equal de- 

 flections with a given load; — J.Park Harrison. Evidences of Lunar Influence on 

 Temperature ; — Report on the Animal and Vegetable Products imported into Liver- 



