CONTENTS. 
XIX. Experiments and observations on the developement of mag- 
netical properties in steel andiron by percussion. By William 
Scoresby, Jun. Esq. Communicated by Sir Humphry Davy, 
Bart. P. R. S. p. 241 
XX. On the Alloys of steel. By J. Stodart, Esq. F.R. S. and 
Mr. M. Faraday, Chemical Assistant in the Royal Institu- 
tion. Communicated by J. Stodart, Esq. F. R. S. p. 253 
XXL Some observations on the buffy coat of the Blood , &c. By 
John Davy, M. D. F. R. S. p. 271 
XXII. On the mechanism of the Spine. By Henry Earle, Esq. 
F. R. S. Surgeon to the Foundling , and Assistant Surgeon to 
St. Bartholomew’s Hospital. p. 276 
XXIII. Of the Nerves which associate the muscles of the Chest , 
in the actions of breathing, speaking, and expression. Being a 
continuation of the paper on the Structure and Functions of the 
Nerves. By Charles Bell, Esq. Communicated by Sir 
Humphry Davy, Bart. LL. D. P. R. S. p. 284 
XXIV. Experiments and observations on the Newry pitch-stone , 
and its products , and on the formation of pumice. By the Right 
Honourable George Knox, F. R. S. p. 313 
XXV. Observations on the changes the egg undergoes during 
incubation in the common fowl, illustrated by microscopical 
drawings. By Sir Everard Home, Bart. V. P. R. S. p. 339 
XXVI. Some observations on Corrosive Sublimate. By John 
Davy, M. D. F. R. S. p. 357 
