viii 



On the Absorption of Gases by Charcoal. No. I. By Dr. R. Angus 

 Smith, F.R.S 424 



On the Embryogeny of Comatula rosacea (Linck). By Professor 

 Wyville Thomson, LL.D., F.R.S.E., M.R.I.A., F.G.S., &c 426 



On some Compounds and Derivatives of Glyoxylic Acid. By Henry 

 Debus, Ph.D., F.R.S 429 



On the Telescopic Appearance of the Planet Mars. By John Phil- 

 lips, M.A., LL.D., F.R.S., F.G.S 431 



On Thallium. By William Crookes, F.R.S 438 



On the Effect of Temperature on the Secretion of Urea, as observed 

 on a Voyage to China, and at Hong Kong. By Emil Becher, M.D. 440 



On Clinant Geometry, as a means of expressing the General Relations 

 of Points in a Plane, realizing Imaginaries, reconciling Ordinary 

 Algebra with Plane Geometry, and extending the Theories of An- 

 harmonic Ratios. By Alexander J. Ellis, B.A., F.C.P.S 442 



Note on the Lines in the Spectra of some of the Fixed Stars. By 

 William Huggins, F.R.A.S., and William Allen Miller, M.D., 

 LL.D., Treas. and V.P.R.S 444 



On Skew Surfaces, otherwise Scrolls. By A. Cayley, F.R.S 447 



Researches on the Refraction, Dispersion, and Sensitiveness of 

 Liquids. By J. H. Gladstone, Ph.D., F.R.S., and the Rev. T. P. 

 Dale, M.A., F.R.A.S 448 



On the Change of Form assumed by Wrought Iron and other Metals 

 when Heated and then Cooled by partial Immersion in Water. By 

 Lieut-Col. H. Clerk, R.A., F.R.S; 453 



On the Influence of Temperature on the Electric Conducting-Power 

 of Thallium and Iron. By A. Matthiessen, F.R.S., and C. Vogt, 

 Ph.D 472 



On the Amyloid Substance of the Liver, and its ultimate destination 

 in the Animal Economy. By Robert McDonnell, M.D 476 



Supplement to a Paper "On the Differential Equations of Dynamics." 

 By Professor George Boole, F.R.S 481 



On Peculiar Appearances exhibited by Blood-corpuscles under the 

 influence of Solutions of Magenta and Tannin. By William 

 Roberts, M.D 481 



On Quinidine, and some Double Tartrates of the Organic Bases. By 

 John Stenhouse, LL.D., F.R.S 491 



Researches into the Chemical Constitution of Narcotine, and of its 

 Products of Decomposition. Part I. By A. Matthiessen, F.R.S., 

 and George Carey Foster, B. A 501 



Postscript to a Paper read January 15, 1863, " On the Formation of 

 Fibrin from Albumen." By Alfred Hutchison Smee, jun 505 



On Diffusion of Vapours : a means of distinguishing between apparent 



