CONTENTS 
T O' 
V O U LXI. 
I, J^E MARKS upon the Nature of the Soil of 
Naples, and its Neighbourhood in a Letter 
from.the Honourable His Ma- 
jefly’s Envoy Extraordinary at Naples, to Mathew- 
Maty, D, Sec. R. S. p. i 
II, ExtraSl of another Letter, from Mr. Hamilton, 
to Dr. Maty, an the Jame SubjeB, p. 48 
III, A Letter from Dr. Frankly n, F.R.S. to the- 
Aflronomer Royal 5 containing an Obfervation of the - 
Franfit of Mercury oroer the Sun, November ^tb 
1769 : By John Winthrop, Efq, F. R. S. Hollifiam 
Frofejfor of Mathematics and Natural Philofophy at 
Cambridge, New England. p. 5 r , 
ly. Obfervations on the Heat of the Ground on Mount 
Vefuvius ; By John Howard, Efq\ F. R. S. Pf'53,; 
V. D^"* 
