IV CONTENTS. 



Page 



On the Trigonometry of the Parabola, and the Geometrical Origin of 

 Logarithms. By the Rev. James Booth, LL.D., F.R.S. &c 68 



Report on the Marine Testaceous Mollusca of the North-east Atlantic 

 and neighbouring Seas, and the physical conditions affecting their 

 development. By Robert MacAndrew, F.R.S 101 



Report on the present state of our knowledge with regard to the 

 Mollusca of the West Coast of North America. By Philip P. 

 Carpenter. {With Four Plates) 159 



Abstract of First Report on the Oyster Beds and Oysters of the Bi'itish 

 Shores. By T. C. Eyton, F.L.S., F.G.S S68 



Report on Cleavage and Foliation in Rocks, and on the Theoretical 

 Explanations of these Phaenomen^ — Part I. By John Phillips, 

 M.A., F.R.S., G.S., Reader in Geology in the University of Oxford. . 369 



On the Stratigraphical Distribution of the Oolitic Echinoderniata. By 

 Thomas Wright, M.D., F.R.S.E 396 



On the Tensile Strength of Wrought Iron at various Temperatures. 

 By William Fairbairn, F.R.S. &c 405 



Mercantile Steam Transport Economy. By Charles Atherton, 

 Chief Engineer of Her Majesty's Dockyard, Woolwich 423 



On the Vital Powers of the Spongiadae. By J. S. Bowerbank, F.R.S., 

 F.G.S. &c 438 



Report of a Committee, consisting of Sir W. .Tardine, Bart., Dr. 

 Fleming, and Mr. E. Ashworth, upon the Experiments conducted 

 at Stormontfield, near Perth, for the artificial propagation of Salmon 451 



Provisional Report on the progress of a Committee appointed at the 

 Meeting in Glasgow, September 1855, to consider the question of the 

 Measurement of Ships for Tonnage, consisting of the following 

 Gentlemen ;— Mr. J. R. Napier, Mr. John Wood, Mr. Allan 

 Gilmore, Mr. Charles Atherton, Mr. James Peake, and Mr. 

 Andrew Henoerson (Reporter) 458 



On Typical Forms of Minerals, Plants and Animals for Museums 461 



Interim Report to the British Association on Progress in Researches 

 on the Measurement of Water by Weir Boards. By James 

 Thomson, C.E 462 



On Observations with the Seismometer. By R. Mallet, C.E. , M.R.I. A. 462 



On the Progress of Theoretical Dynamics. By A. Cayley, M.A., 

 F.R.S 463 



Report of a Committee appointed by "The British Association for the 

 Advancement of Science," to consider the formation of a Catalogue 

 of Philosophical Memoirs 463 



