686 
Geometrical. Origin of Logarithms;—R. MacAndrew, Report on the Marine 
festaceous 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. 8. Bowerbank, on the Vital 
Powers of the Spongiade ;—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 or tHe TWENTY-SEVENTH MEETING, at 
Dublin, 1857, Published at 15s. 
ConTENTSs :—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 Mines in Corn- 
—a a + 1pB¢) = 15¢ + 1 
le+ lnyt +1et4t 
a ¢étant entier négatif, et de quelques-cas dans lesquels cette somme est exprimable 
par une combinaison de factorielles, la notation a‘|+1désignant le produit des 
facteurs a (a+1) (a+2) &e....(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 Type of 
Shipping; as respects the Proportions of Length, Breadth, and Depth ;—J. S. Bower- 
bank, Further Report on the Vitality of the Spongiade ;—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 
in the Botanical Garden of the Royal Agricultural College at Cirencester ;—William 
Fairbairn, onthe Resistance of Tubes to Collapse ;—George C. Hyndman, Report of 
the Proceedings of the Belfast Dredging Committee ;—Peter W. Barlow, on the 
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- 
pool from the year 1851 to 1855 (inclusive) ;—Andrew Henderson, Report on the Sta- 
tistics of Life-boats and Fishing-boats on the Coasts of the United Kingdom. 
Together with the Transactions of the Sections, the Rev, H. Lloyd's Address, and 
Recommendations of the Association and.its Committees. 
wall;—Dr. G. Plarr, de quelques Transformations de la Somme 3% 
