CONTENTS 
I. Additional Researches on the Electrolysis of Secondary Compounds. By J. Frederic 
Daniell, Esq., D.C.L., For. Sec. R.S., Prof Chem. in King's College, London, 
and W. A. Miller ,Esq.,M.D., Dem. of Chem. in King's College, Lon don. page 1 
II. On the Thermal Changes accompanying Basic Substitutions. By Thomas Andrews, 
M.D., M.R.I.A., Professor of Chemistry in the Royal Belfast Institution. 
Communicated by Michael Faraday, D.C.L., F.R.S., 8$c. 8$c. &;c. . . 21 
III. A Description of an extensive series of the Water Battery ; with an Account of 
some Experiments made in order to test the relation of the Electrical and the 
Chemical Actions which take place before and after completion of the Voltaic 
Circuit. By John P. Gassiot, Esq., F.R.S. 39 
IV. On the Existence of Phosphoric Acid in Rocks of Igneous Origin. By George 
Fownes, Ph. D., Chemical Lecturer in the Middlesex Hospital Medical School. 
Communicated by Thomas Graham, Esq., F.R.S., Sfc. 8$c 53 
V. Miscellaneous Observations on Animal Heat. By John Davy, M.D., F.R.S. , 
L. and E 57 
VI. A Description of certain Belemnites, preserved, with a great proportion of their 
soft parts, in the Oxford Clay, at Christian-Malford, Wilts. By Richard 
Owen, Esq., F.R.S., &;c 65 
