CONTENTS. 
I. Researches on the Tides. — Fourth Series. On the Empirical Laws of the Tides in 
the Port of Liverpool. By the Rev. W. Whewell, M.A. F.R.S. . . page 1 
II. Researches towards establishing a Theory of the Dispersion of Light. No. II. 
By the Rev. Baden Powell, M.A. F.R.S. Savilian Professor of Geometry in 
the University of Oxford 17 
III. An Account of the great Earthquake experienced in Chile on the 20 th of February, 
1835 ; with a Map. By Alexander Caldcleugh, Esq. F.R.S. F.G.S., 8$c. 21 
IV. Some Account of the Volcanic Eruption of Coseguina in the Bay of Fonseca, com- 
monly called the Bay of Conchagua, on the Western Coast of Central America. 
By Alexander Caldcleugh, Esq., F.R.S. F.G.S., 8$c 27 
V. Memoranda made during the appearance of the Aurora Borealis on the 18 th of 
November , 1835. By Charles C. Christie, Esq. M.A . Communicated by 
S. Hunter Christie, Esq. M.A. F.R.S. fyc 31 
VI. On the Anatomical and Optical Structure of the Crystalline Lenses of Animals. 
Continued from a former Paper {Phil. Trans. 1833, p. 332.). By Sir David 
Brewster, K.H. LL.D. F.R.S. 8$c. 8$c 35 
VII. On an Artificial Substance resembling Shell: by Leonard Horner, Esq. F.R.SS. 
Lond. 8$ Edinb. With an Account of an Examination of the same : by Sir David 
Brewster, LL.D. F.R.S. 8$c 49 
VIII. Discussion of Tide Observations made at Liverpool. By J. W. Lubbock, Esq. 
F.R.S. 57 
IX. Geometrical Investigations concerning the Phenomena of Terrestrial Magnetism. 
Second Series : — On the Number of Points at which a magnetic needle can take 
a position vertical to the Earth's surface. By Thomas Stephens Davies, Esq., 
F.R.SS. L. 8$ E. F.R.A.S. Royal Military Academy, Woolwich. ... 75 
X. On Voltaic Combinations. In a Letter addressed to Michael Faraday, D.C.L. 
F.R.S., Fullerian Prof. Chem. Royal Institution, Corr. Memb. Royal 8$ Imp. 
Acadd. of Science, Paris, Petersburgh, fyc. By J. Frederic Daniell, F.R.S., 
Prof. Chem. in King's College, London 107 
