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 The Fossil Flora of Bovey Tracey. By Dr. Oswald Heer 453 



Anniversary Meeting Address of the President 457 



On Crystallization and Liquefaction, as influenced by Stresses tending 

 to change of form in the Crystals. By Professor .James Thomson . . 473 



Determination of the Magnetic Decimation, Dip, and Force, at the 

 Fiji Islands, in 1860 and 1861. By Colonel William James Smythe, 

 R.A 481 



On the Calculus of Functions. By W. H. L. Russell, A.B 487 



On TscKirnhausen's Transformation. By Arthur Cayley, Esq., F.R.S. 487 



On a Series for calculating the Ratio of the Circumference of a Circle 

 to its Diameter. By Amos Clarkson, Esq 489 



On the Production of Vibrations and Sounds by Electrolysis. By 

 George Gore, Esq 491 



On Perchloric Acid and its Hydrates. By Henry Enfield Roscoe, 

 B.A., Ph.D 493 



Preliminary Note on the Nature and Qualities of Voltaic Currents. 

 By George Gore, Esq 504 



On the Diurnal Tides of Port Leopold, North Somerset. By the Rev. 

 Samuel Haughton, M.A., F.R.S 507 



On the Posterior Lobes of the Cerebrum of the Quadrumana. By 

 William Henry Flower, Esq., F.R.C.S 508 



On the General Forms of the Symmetrical Properties of Plane Tri- 

 angles. By Thomas Dobson, B.A ...,,.,.. 609 



Note on Ethylene-Dichloride of Platinum. By P. Griess, Esq., and 

 C. A. Martins, Ph.D. r 509 



On the Development of Striped Muscular Fibre in Man, Mammalia, 

 and Birds. By J. Lockhart Clarke, Esq., F.R.S 513 



On the Influence of Temperature on the Electric Conducting Power 

 of the Metals. By A. Matthiessen, Esq., F.R.S., and M. von Bose. 516 



Notes of Researches on the Poly- Ammonias. No. XIX. Aromatic 

 Diamines. By A. W. Hofmann, LL.D., F.R.S 518 



Contributions towards the History of the Monamines. No. V. Action 

 of Chloracetic Ether on Triethylamine and Triethylphosphine. By 

 A. W. Hofmann, LL.D., F.R.S 525 



Additional Observations and Experiments on the Influence of Phy- 

 sical Agents in the Development of the Tadpole and the Frog. By 

 John Higginbottom, Esq., F.R.S 532 



Note on Internal Radiation. By George G. Stokes, M.A., Sec. R.S. 537 



On the Intensity of the Light reflected from or transmitted through 



a Pile of Plates. By George G. Stokes, M.A., Sec. R.S 545 



On the Theory of the Polyhedra. By the Rev. T. P. Kirkman, M. A., 



F.R.S 556 



On the Calculus of Symbols. Second Memoir. By W. H. L. Russell, 



A.B. 556 



On Internal and External Division in the Calculus of Symbols. By 



William Spottiswoode, M.A. r F.RS. 557 



