_An Introductory Essay to the Doctrine of _Sounds_, containing some Proposals for the Improvement of _Acousticks_; as it was presented to the _Dublin_ Society, by the Right Reverend Father in God _Narcissus_, Lord Bishop of _Ferns_ and _Leighlin_._ 121 _A Discourse concerning the Modern _Theory_ of _Generation_, by Dr. _Geo. Garden_, of _Aberdeen_, being part of a Letter to Dr. _William Musgrave_, L. L. D. _Reg. Soc. S._ and by him communicated to the Royal Society._ 142 _A short Discourse concerning _Concoction_ Read at a Meeting of the _Royal Society_, by _Clopton Havers_, M. D. Fellow of the Royal Society._ 153 _A Discourse concerning some Influence of _Respiration_ on the Motion of the _Heart_ hitherto unobserved. By _J. Drake_, M. D. F. R. S._ 171 _Some Thoughts and Experiments concerning _Vegetation_. By _John Woodward_, M. D. of the College of Physicians and Royal Society, and Professor of Physick in _Gresham-College_._ 203 _An Account of the Measure of _Gold_ upon Gilt Wire; together with a Demonstration of the exceeding Minuteness of the _Atoms_, or constituent Parts of _Gold_; as it was read before the _Royal Society_, by Mr. _E. Halley_._ 243 _An Account of the several Species of _Infinite Quantity_, and of the Proportions they bear one to the other; as it was read before the _Royal Society_, by _E. Halley_._ 246 _An Account of Dr. _Robert Hook's_ Invention of the _Marine Barometer_, with it's Description and Uses. Published by Order of the Royal Society by Mr. _E. Halley_._ 250 _A Discourse concerning the _Proportional Heat_ of the Sun in all _Latitudes_; with the Method of collecting the same, as it was read before the _Royal Society_ in one of their late Meetings, by Mr. _E. Halley_._ 256 _Concerning the Distance of the _Fixed Stars_, by the Honourable _Fran. Roberts_, Esq; F. R. S._ 265 _Mr. _Isaac Newton's_ Theory of the _Moon_._ 268 _An estimate of the Degrees of the Mortality of _Mankind_, drawn from Curious Tables of _Births_ and _Funerals_ at the City of _Breslaw_; with an Attempt to ascertain the _Price of Annuities_ upon Lives, by Mr. _E. Halley_._ 280 _A Discourse concerning _Gravity_, and its Properties, wherein the Descent of _Heavy Bodies_, and the Motion of _Projects_ is briefly, but fully handled: Together with the Solution of a Problem of great Use in _Gunnery_, by Mr. _E. Halley_._ 302