CONTENTS, 
I. Researches in the Integral Calculus. — Part II. By H. F. Talbot, Esq. 
F.R.S page 1 
II. Researches towards establishing a Theory of the Dispersion of Light . — No. III. 
By the Rev. Baden Powell, M.A. F.R.S. , Savilian Professor of Geometry in 
the University of Oxford 19 
III. On ihe Optical Phenomena of certain Crystals. By H. F. Talbot, Esq. F.R.S. 25 
IV. The Bakerian Lecture. — Further Observations on the Optical Phenomena of 
Crystals. By H. F. Talbot, Esq. F.R.S. 29 
V. Observations on the Electro-chemical Influence of long-continued Electric Currents 
of Low Tension. By Golding Bird, F.L.S. F.G.S., Lecturer on Experimental 
Philosophy at Guys Hospital , Sfc. Communicated by Thomas Bell, Esq. 
F.R.S . 37 
VI. Inquiries respecting the Constitution of Salts. Of Oxalates, Nitrates, Phosphates, 
Sulphates, and Chlorides. By Thomas Graham, Esq. F.R.S. Edin., Professor 
of Chemistry in the Andersonian University of Glasgow, Corr. Member of the 
Royal Academy of Sciences of Berlin, 8$c. Communicated by Richard Phil- 
lips, Esq. F.R.S 47 
VII. Researches on the Tides. — Seventh Series. On the Diurnal Inequality of the 
Height of the Tide, especially at Plymouth and at Singapore ; and on the Mean 
Level of the Sea. By the Rev. W. Whewell, M.A. F.R.S., Fellow of Trinity 
College, Cambridge 73 
VIII. On the Structure of the Brain in Marsupial Animals. By Richard Owen, Esq. 
F.R.S., Hunterian Professor of Anatomy to the Royal College of Sur- 
geons 87 
IX. On the Tides. By John William Lubbock, Esq. F.R.S 97 
X. Further Observations on Voltaic Combinations. In a Letter addressed to Michael 
Faraday, Esq. D.C.L. F.R.S., Fullerian Prof. Chem. Royal Institution, Corr. 
Memb. Royal 8$ Imp. Acadd. of Sciences, Paris, Petersburgh, fyc. By J. Fre- 
derick Daniell, F.R.S., Prof. Chem. in King's College, London, 8$c. . 141 
XI. Analysis of the Roots of Equations. By the Rev. R. Murphy, M.A., Fellow of 
Caius College, Honorary Member of various Philosophical Societies. Commu- 
nicated by J. W. Lubbock, Esq. F.R.S. 161 
