CONTENTS. 
I. The Croonian Lecture. Microscopical observations on the 
suspension of the muscular motions of the Vibrio Tritici. By 
Francis Bauer, Esq. F. R. S. F. L. S. and H. S. p. i 
II. On Metallic Titanium. By W. H. Wollaston, M. D. 
V.P.R.S. p. 17 
III. On the difference of structure between the human Membrana 
Tympani and that of the Elephant. By Sir Everard Home, 
Bart. V. P. R. S. p. 23 
IV. Corrections applied to the Great Meridional Arc , extending 
from latitude 8° 9' 38", 39, to latitude 1 8° 3' 23", 64, to reduce 
it to the Parliamentary Standard. By Lieutenant Colonel W. 
Lambton, F. R. S. and Corresponding Member of the Royal 
Academy of Sciences at Paris. p. 27 
V. On the changes which have taken place in the declination of 
some of the principal fixed Stars. By J. Pond, Esq. Astro- 
nomer Royal , F. R. S. p. 34 
VI. Appendix to the preceding Paper on the changes which appear 
to have taken place in the declination of some of the fixed Stars. 
By John Pond, Esq. Astronomer Royal , F. R. S. p. 39 
VII. On the parallax of a Lyrce. By John Pond, Esq. 
Astronomer Royal, F. R. S. p. 53 
VIII. Observations on the heights of places in the Trigonometrical 
Survey of Great Britain, and upon the Latitude of Arbury Hill. 
By B. Bevan, Esq. Communicated by Sir H. Davy, Bart. 
P. R. S. 
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