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VOL. LXXVI. Part II. 
XIV. ATE W ’Experiments upon Heat . By Colonel Sir Ben- 
jamin Thompfon, Knt. F . R . S. In a Letter to 
Sir Jofeph Banks, Bart . P. R . S. Page 273 
XV. Hijlory and DiJfeCiion of an extraordinary Introfufception . 
I?y John Coakley Lettfom, M. D. F . 2?. & andA.S. p.305 
XVI. Experiments on the Ocular Spedlra of Light and 
Colours . J5jy Robert Waring Darwin, M. D. ; communicated 
by Erafmus Darwin, M. D. F. i?. S'. p. 31 3 
XVII. Obfervations on fame Caufas of the Excefs of the Mortality 
of Males above that of Females . By Jofeph Clarke, M. D. 
Phyfcian to the Lying-in Hof pit al at Dublin. Communicated 
by the Rev . Richard Price, D. D. F. R. S. in a Letter to 
Charles Blagden, M. D. Sec . R . S. p. 349 
XVIII. Some Particulars of the prefent State of Mount Vefu- 
vius ; with the Account of a Journey into the Province of 
Abruzzo, and a V oyage to the If and of Ponza. In a Letter 
from Sir William Hamilton, K. B. F. R. S. and A. S. to 
Sir Jofeph Banks, Bart . P. R . S. p. 365 
XIX. An Account of a new Electrical Fijh. In a Letter from 
Lieutenant William Paterfon to Sir Jofeph Banks, Bart. 
P * R* S. p. 382 
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XX. 
