Numb. 424.
PHILOSOPHICAL
TRANSACTIONS.
For the Months of July and August, 1732.
The CONTENTS.
I.An extract from the minutes of the Royal Society, March 16, 1731, containing an uncommon Case of a Distempered Skin, by John Machin, Sec. R.S. & Prof. Astr. Gresh.
II.Conjectures upon the nature of Intermitting and Reciprocating Springs.By Mr. Joseph Atwell, F.R.S.
III.Immersiones, atque Emersiones Satellitum Jovis Observatæ Perkini à P. P. Ignatio Kegler, & Andrea Pereira, Soc. Jesu, a mense Novem. 1730, ad Revd. P. Johannem Baptistam Carbone, Soc. Jesu, R.S.S. transmissæ; et ex ejusdem Cl. Viri Epistolâ ad Jacobum de Castro Sarmento, M.D. Col. Medic. Lond. L.& R.S.S. excerptæ.
IV. A
