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and real Vapour-densities of Chemical Compounds. By J. A. 

 Wanklyn and J. Robinson 507 



On a Simple Formula and Practical Rule for calculating Heights 

 barometrically without Logarithms. By Alexander J. Ellis. B.A.. 

 F.C.P.S. .511 



Bessel's Hypsometric Tables, as corrected by Plantamour, reduced to 

 English Measures, and recalculated. By Alexander J. Ellis. B.A., 

 F.C.P.S 517 



On Ozone. By E. J. Lowe, F.R.A.S., F.L.S. 518 



On the Equations of Rotation of a Solid Body about a fixed Point. 

 By William Spottiswoode, M. A., F.R.S 523 



On the Fossil Human Jawbone recently discovered in the Gravel 

 near Abbeville. By W. B. Carpenter, M.D., V.P.R.S 524 



On the Diurnal Inequalities of Terrestrial Magnetism, as deduced 

 from observations made at the Royal Observatory, Greenwich, from 

 1841 to 1857. By George Biddell Airy, F.R.S., Astronomer Royal 529 



On the direct transformation of Iodide of Allyle into Iodide of Pro- 

 pyle. By Maxwell Simpson, M.B., F.R.S 533 



On the Distillation of Mixtures : a Contribution to the Theory of 

 Fractional Distillation. By J. A. Wanklyn 534 



On the Arrangement of the Muscular Fibres of the Ventricular Por- 

 tion of the Vertebrate Heart ; with Physiological Remarks. By 

 James Pettigrew, M.D 536 



On Spectrum Analysis ; with a Description of a large Spectroscope 

 having nine Prisms, and Achromatic Telescopes of two-feet focal 

 power. By John P. Gassiot, F.R.S 536 



The Bakerian Lecture. On the Direct Correlation of Mechanical 

 and Chemical Forces. By Henry Clifton Sorby, F.R.S 538 



On the Physiological Properties of Nitrobenzole and Aniline. By 

 Henry Letheby, M.B 550 



On the Immunity enjoyed by the Stomach from being digested by its 

 own Secretion during Life. By Frederick W. Pavy, M.D., F.R.S. 559 



On a Question of Compound Arrangement. By J. J. Sylvester, M.A.. 

 F.R.S 561 



On a Theorem relating to Polar Umbrae. By J. J. Sylvester, M.A., 

 F.R.S 563 



Notes principally on the Thermo-electric Currents of the Ritterian 

 Species. By C. K. Akin 565 



On the Nature of the Sun's Magnetic Action upon the Earth. By 

 C. Chambers 567 



Numerical Elements of Indian Meteorology. Series I. By Dr. Her- 

 mann de Schlagintweit, Corr. Memb. of the Academies of Sciences 

 of Munich, Madrid, Lisbon, &c 567 



On the Structure of the so-called Apolar, Unipolar, and Bipolar 

 Nerve-cells of the Frog. By Lionel S.Beale, M.B., F.R.S., F.R.C.P. 569 



b 



