CONTENTS. 
VII. Elements of Captain Hall's Comet. By J. Brinkley, 
D. D. F. R. S. and M. R. I. A. and Andrew's Professor of 
Astronomy in the University of Dublin. In a Letter addressed 
to W. H. Wollaston, M. D. V. P. R. S. - - 50 
VIII. On the Electrical phenomena exhibited in vacuo. By Sir 
Humphry Davy, Bart. P. R. S. - - - 64 
IX. Croonian Lecture. On the anatomical structure of the Eye ; 
illustrated by microscopical drawings, executed by F. Bauer, 
Esq. By Sir Everard Home, Bart. V. P. R. S. 7 6 
X. A Letter from John Pond, Esq. Astronomer Royal, to Sir 
Humphry Davy, Bart. President of the Royal Society, rela- 
tive to a derangement in the Mural Circle at the Royal 
Observatory. ------ 8 6 
XI. On the finite extent of the Atmosphere. By William 
Hyde Wollaston, M. D. V . P. R. S. - - 89 
XII. On the expansion in a series of the attraction of a Spheroid. 
By James Ivory, M. A. F.R. S. - - - 99 
XIII. On the late extraordinary depression of the Barometer. By 
Luke Howard, Esq. F. R. S. - - - 113 
XIV. On the anomalous magnetic action of hot iron between 
the white and blood-red heat. By Peter Barlow, Esq. of the 
Royal Military Academy. Communicated by Major Thomas 
Colby, of the Royal Engineers, F.R.S. - 117 
XV. Observations for ascertaining the length of the Pendulum at 
Madras in the East Indies, latitude 13 0 4' 9",! N. with the 
conclusions drawn from the same. By John Goldingham, 
Esq. F.R. S. - - - - 127 
XVI. Account of an assemblage of Fossil Teeth and Bones of 
Elephant, Rhinoceros, Hippopotamus , Bear, Tiger, and Hyrena, 
and sixteen other animals ; discovered in a cave at Kirkdale, 
% 
