CONTENTS. 
I. The Bakerian Lecture . An Account of Experiments to de- 
termine the amount of the Dip of the Magnetic Needle in 
London , in August 1821 ; with Remarks on the Instruments 
which are usually employed in such determinations . By Cap- 
tain Edward Sabine of the Royal Regiment of Artillery 5 
F.R.S. - - - - 1 
II. Some positions respecting the influence of the Voltaic Battery 
in obviating the effects of the division of the eighth pair of 
nerves. Drawn up by A. P. Wilson Philip, M.D. F.R.S. 
Edin. Communicated by B. C. Brodie, Esq. F. R. S. 22 
III. On some alvine concretions found in the colon of a young 
man in Lancashire , after death. By J. G. Children, Esq. 
F. R S. &c. &c. Communicated by the Society for Pro- 
moting Animal Chemistry. - 24 
IV. On the concentric adjustment of a triple Object-glass. By 
William Hyde Wollaston, M. D. V. P. R. S. - 32 
V. On a new species of Rhinoceros found in the interior of Africa , 
the skull of which bears a close resemblance to that found in a 
fossil state in Siberia and other countries. By Sir Everard 
Home, Bart. V. P. R. S. - - - 38 
VI. Extract of a Letter from Capt. Basil Hall, R. N. F.R. S. 
to William Hyde Wollaston, M. D. V.P. R. S. contain- 
ing observations of a Comet seen at Valparaiso. - 46 
