libres dans lea Machines a un seul Cylindre. Par M. Mahistre, 

 Professeur a la Faculty des Sciences de Lille page 110 



On the Action of Nitrous Acid on Aniline. By A. Matthiessen, Ph.D. 118 



On the Existence of Amorphous Starch in a new Tuberaceous Fungus. 

 By Frederick Currey, Esq., M.A 119 



On the Singular Solutions of Differential Equations. By the Rev. 

 Robert Carmichael, Fellow of Trinity College, Dublin 123 



On the daily Fall of the Barometer at Toronto. By Thomas Hopkins, 

 Esq 124 



Researches on the Poison-apparatus in the Actiniadae, By Philip 

 Henry Gosse, Esq., F.R.S : 125 



An Account of some recent Researches near Cairo, undertaken with 

 the view of throwing light upon the Geological History of the 

 Alluvial Land of Egypt. Part II. By Leonard Horner, Esq., 

 V.P.R.S 128 



On the Functions of the Tympanum. By James Jag^o, A.B. Cantab., 

 M.B. Oxon., Physician to the Royal Cornwall Infirmary 134 



Remarks on the interior Melting of Ice. By Professor William 

 Thomson, F.R.S. In a Letter to Professor Stokes, Sec.R.S 141 



On the Practical Use of the Aneroid Barometer as an Orometer. By 

 Captain W. S. Moorsom, Member of the Institution of Civil En- 

 gineers 143 



The Bakerian Lecture. On the Stratifications and Dark Bands in 

 Electrical Discharges as observed in Torricellian Vacuums. By 

 John P. Gassiot, Esq., V.P.R.S 146 



Notes of Researches on the Poly- Ammonias. By Aug. W. Hofmann, 

 Ph.D., F.R.S. &c 150 



Description of the Skull and Teeth of the Placodus laticeps, Ow., with 

 indications of other new Species of Placodus, and evidence of the 

 Saurian Nature of that Extinct Genus. By Prof. Richard Owen, 

 F.R.S. &c : 157 



On the probable Origin of some Magnesian Rocks. By T. Sterry 

 Hunt, Esq., of the Geological Survey of Canada 159 



A Fourth Memoir upon Quantics. By Arthur Cayley, Esq., F.R.S. 165 



A Fifth Memoir upon Quantics. By Arthur Cayley, Esq., F.R.S 166 



On the Tangential of a Cubic. By Arthur Cayley, Esq., F.R.S 167 



On the Constitution of the Essential Oil of Rue. By C. Greville 

 Williams, Esq., Lecturer on Chemistry in the Normal College, 

 Swansea 167 



On the Relative Power of Metals and their Alloys to conduct Heat. 

 By F. Grace Calvert, Esq., F.C.S., M.R.Acad. of Turin ; and 

 Richard Johnson, Esq., M. Phil. Soc. of Manchester 169 



On the Surface which is the Envelope of Planes through the Points of 

 an Ellipsoid at right angles to the Radius Vectors from the Centre. 

 By Arthur Cayley, Esq., F.R.S 171 



