Sir,
THE Council of the Royal Society , considering with themselvesthe great importance of having the Public Meeting of the said Societyconstantly provided with entertainments suitable to the design of theirinstitution, have thought lit to undertake to contribute each of themone; not doubting but that many of the Fellows of the Society will joinwith them in carrying on such an undertaking: and being well per-suaded of your approbation of this their purpose, (so much tending to thereputation and support of the Society) they desire that you would bepleased to undertake for one; and to name any Thursday after thefourteenth of January next, such as shall be most convenient for you,when you will present the Society at one of their Public Meetings, byyourself, or some other of the Fellows for you, with such a Discourse(grounded upon, or leading to, Philosophical Experiments) on a subjectof your own choice. In doing of w T hich you will benefit the Society ,and oblige,,.
Sir,
Your humble Servant,
Lonuox, Dec,.2.8, 1674:
BROUNCKER, P. R. s.