viii 



Page 



On a remarkable Alteration of Appearance and Structure of the Human 

 Hair. By Erasmus Wilson, F.RS 406 



Remarks on tlie Nature of Electric Energy, and on tlie Means by wbicb it 

 is transmitted. By Charles Brooke, M.A., F.R.S., P.M.S., &c 408 



A Comparison between some of the simultaneous Records of the Barographs 

 at Oxford and at Kew. By Balfour Stewart, LL.D., F.R.S., Superinten- 

 dent of the Kew Observatory , 413 



On the Lunar-diurnal Variation of the Magnetic Declination, with special 

 regard to the Moon's Declination. By Dr. G. Neumayer 414 



The Bakerian Lecture. Researches on Gun-cotton, — Second Memoir. On 

 the Stability of Gun-cotton. By F. A. Abel, F.R.S., V.P.C.S 417 



Observations of Temperature during two Eclipses of the Sun (in 1858 and 

 1867). By John Phillips, M.A., LL.D., D.C.L., F.R.S., Professor of 

 Geology in the University of Oxford 421 



A new fact relating to Binocular Vision. By A. Claudet, F.R.S 424 



On the Calculation of the Numerical Value of Euler's Constant, which Pro- 

 fessor Price, of Oxford, calls E. By William Shanks, Esq., Houghton- 

 le-Spring, Durham 429 • 



On a Definite Method of Qualitative Analysis of Animal and Vegetable 

 Colouring-matters by means of the Spectrum-Microscope. By H. C. 

 Sorby, F.R.S., &c 433 



Optics of Photography. — On a Self-acting Focus-Equalizer, or the means of 

 producing the Differential Movement of the two Lenses of a Photographic 

 Optical Combination, which is capable, during the exposure, of bringing 

 consecutively all the Planes of a Solid Figure into Focus, without alte- 

 ring the size of the various images superposed. By A. Claudet, F.R.S. 456 



On the Genera Heterophyllia, Battershyia, Palceocyclus, and Asterosmilia ; 

 the Anatomy of their Species, and their Position in the Classification of 

 the Sclerodermic Zoantharia. By Dr. P. M. Duncan, Sec. G.S 460 



Contribution to the Anatomv of Hatteria (Rhynchocephalus, Owen). By 

 Albert Gtinther, M.A., Ph.D., M.D 460 



On the Curves which satisfy given conditions. By Pix)f. Cayley, F.R.S. . . 462 



Second Memoir on the Curves which satisfy given conditions ; the Principle 

 of Correspondence. By Professor Cayley, F.R.S 463 



On the Development and Succession of the Teeth in the Marsupialia. By 

 WiUiam Henry Flower, F.R.S., F.R.C.S., &c.. Conservator of the Mu- 

 seum of the Royal College of Surgeons of England 464 



On a Property of Curves which fulfil the condition ^^+^^=^- 



J. Macquorn Rankine, C.E., LL.D., F.R.SS. L. & E 468 



A Tabular Form of Analysis, to aid in tracing the Possible Influence of 

 Past and Present upon future states of Weather. By S, Elliott Hoskins, 

 F.R.S., &c 470 



Monthly Magnetic Determinations, from June to November 1866 inclusive^ 



