C vi 3 
VI. Experiments made with a view to ascertain the principle on 
which the action of the heart depends, and the relation which 
subsists between that organ and the nervous system . By A. P. 
Wilson Philip, Physician in Worcester . Communicated by 
Andrew Knight, Esq. F. R . S. 65. 
VH. Experiments to ascertain the influence of the spinal marrow 
on the action of the heart in fishes. By Mr. William Clift. 
Communicated by Sir Everard Home, Bart. V. P. R. S. 91. 
VIII. Some experiments and observations on the colours used in 
painting by the Ancients. By Sir Humphry Davy, LL. D. 
F. R. S. 97. 
IX. On the laws which regulate the polarisation of light by re- 
flexion from transparent bodies. By David Brewster, LL.D. 
F.R.S. Edin. and F.S.A. Edin. In a letter addressed to the 
Right Hon. Sir Joseph Banks, Bart. K. B. P. R. S. 125. 
