to Sir Hans Sloane, Bart. Præf. Coll. Med. & R.S. concerning the Frost in January 17301.
V.A letter to Cromwell Mortimer, M.D. Secr. R.S. containing several Experiments concerning Electricity; by Mr. Stephen Gray.
VI.Curvarum Hyperbolicarum, æquationibus trium nominum utcunque definitarum, Quadratura generalis duplici Theoremate exhibita à Do. Samuele Klingenstierna, Profess. Digniss. Math. in Acad. Upsal, & R.S.S. Communicante Do. Jacobo Stirling, ejusdem etiam Soc. Doctiss. S.
VII.Casus rarissimus Plica Polonicæ enormis à D. Abrahamo Vatero, M. D. Prof. Anatom. Wittemberg, & R.S.S. per D. Conradum Sprengell, Equitem, M.D. R.S.S. & Coll. Med. Lond. Licent. communicatus.
VIII.An Extract of a Letter from Sir Conrad Sprengell, M.D. R.S.S. & Coll. Med. Lond. Licen. to Dr. Mortimer; wherein he inclosed the foregoing Account of the Plica Polonica; together with an Article from the Breslaw Sammlung von Natur und Medicin, &c Geschichten, upon the same Subject, trnslated from the High-Dutch by Dr. Mortimer, R.S. Secr.
IX.An Account of an unusual Agitation in the Magnetical Needle, observed to last for some Time, in a Voyage from Maryland, by Capt. Walter Hoxton; communicated in a Letter to David Papillon, Esq; F.R.S.
