viii CONTENTS. 
whole rendered more convenient for Experiments than 
heretofore : By C. L. Epinafl'e, F. R S. p. i86. 
XX. Two Letters from the Honourable William Ha- 
milton, His Majefty s Envoy Extraordinary at Na- 
ples, to the Earl of Morton, E ref dent of the Royal 
Society , containing an Account of the laf Eruption 
of Mount Vefuvius. p. 192. 
XXI. Extradl of a Letter from John Howard, Efq ; 
F. R. S. to William Watfon, M. D. F. R. S. 
giving fo?ne Obfervations on the Heat oj the Waters 
at Bath. p. 201. 
XXII. Obfervations on the Heat of the Bath and 
Briftol Waters , by Mr. John Canton, A. M. 
F. R. S. p. 203. 
XXIII. A Letter to Dr. William Watfon, F. R . S . 
from the Honourable Daines Barrington, F. R. S. 
on J'ome particular Fif found in Wales. p. 204. 
XXIV. An Obfervation of an Eclipfe of the Sun at 
the If and of Newfoundland, Auguft 5, 1766, by 
Mr. James Cook, with the Longitude of the Place 
of Obfervation deduced from it : Communicated by 
J. Bevis, M. D. F. R. S. p. 21 5. 
XXV. Letter to Mr. Dacofta, Librarian , &c. to the 
Royal Society , from Mr. William Martin j contain- 
ing an Extradl of a Letter from his Son Fleming 
Martin, Efq ; chief Engineer at Bengal, on the Heat 
of the Climate . p. 217. 
XXVI. Experiments on the Peruvian Bark, by Tho- 
mas Percival, M. D. F. R. S. p. 221. 
XXVII. An Inquiry into the probable Parallax , and 
Magnitude of the fixed Stars , from the Quantity of 
Light which they afford us, and the particular Cir - 
cumfances 
