CONTENTS. 
I. The Bakerian Lecture. — Researches on the Tides. Thirteenth Series. On the 
Tides of the Pacific, and on the Diurnal Inequality. By the Rev. W. Whe well, 
D.D., F.R.S. ^c page 1 
II. On the Solution of Linear Differential Equations. By Charles James Hargreave, 
Esq., B.L., F.R.S. , Professor of Jurisprudence in University College, 
London 31 
III. On a new substance occurring in the Urine of a patient with Mollities Ossium. 
By Henry Bence Jones, M.A., F.R.S., Physician to St. George's Hospital 55 
IV. Examination of the proximate Principles of some of the Lichens. By John Sten- 
HOUSE, Esq., Ph.D., Glasgow. Communicated hy Thomas Graham, Esq., 
F.R.S. 8sc 63 
V. On the Heat disengaged during Metallic Substitutions. By Thomas Andrews, 
M.D., M.R.I.A., Vice-President of Queens College, Belfast, &jc. Communi- 
cated hy Michael Faraday, Esq., F.R.S. 8fc. ^c 91 
VI. Report of Observations made upon the Tides in the Irish Sea, and upon the great 
similarity of Tidal Phenomena of the Irish and English Channels, and the im- 
portance of extending the Experiments round the Land's End and up the English 
Channel. Embodied in a letter to the Hydrographer. By Captain F. W. 
Bee CHE Y, R.N., F.R.S. Communicated by G.B. Airy, Esq., F.R.S. 8$c., Astro- 
nomer Royal 105 
VII. On the Blow-hole of the Porpoise. By Francis Sibson, Esq. Communicated by 
Esq., F.R.S. 117 
VIII. On the Corrections to be applied to the Monthly Means of Meteorological 
Observations taken at any hour, to convert them into Mean Mo7ithly values. By 
James Glaisher, Esq., of the Royal Observatory at Greenwich. Communicated 
by G. B. Airy, Esq., F.R.S. 8^c., Astronomer Royal 125 
IX. On the Structure of Chitons. By 3. F. Gb.\y, Esq., F.R.S., F.Z.S. &^c. . 141 
X. An Investigation on the Chemical Nature of Wax. — I. On Cerotic Acid, a new 
Acid contained in Bees' -Wax. By Benjamin Collins Brodie, Esq. Com- 
municated by Sir Benjamin C. Brodie, Bart., F.R.S. 8^c 147 
XI. An Investigation on the Chemical Nature of Wax. — II. On the Chemical Nature 
of a Wax from China. Benjamin Collins Brodie, Esq. Communicated 
by Sir Benjamin C. Brodie, Bart., F.R.S. 8fc 159 
