Ftfumb. 4 6 $. 
PHILOSOPHICAL 
TRANSACTIONS. 
t r ' : ‘ \ 
From 'January 20. to February 3. 1742-3. 
TheCONTENTS. 
I. Johannis Marchionis Polcni, R.S.S. Lde novis 
quibufdam Cogitationibus ad explorandum , ?mm 
Pendula % *vi aliqua centrifuga perturbentur , Com- 
nientariolmn lllufirijfme Societati Regal i 
Londinenfi oblatum. Pag. 299. 
II. Obfervationes Aftronomic# habit re in Collegio 
Pekinenfi a Ratribus Societal is J es u, a Mcnfe 
Novembri 1740. a ^Z>Jacobo Hodglon, R. S. S. 
cum Regia Societate communicate. 30 6. 
III. Extract by John van Rixtel, F.R.S. of Mr. W. 
KerfleboomV Second and Third Treatife Con- 
firming the Manner how to know the probable Quan- 
tity 0/’ People in the Provinces of Holland and 
Weft-Friefland, befides a Foundation on which to 
prove the probable Lives 0/* Widows, and likewife 
a Rule whereby to know the Duration of Mar- 
riages. 315- 
IV. A Letter from Mr. Jofeph Hobfon to Mr. Peter 
Coliinfon, F, R. S. concerning the wonderful In- 
~ create of the Seeds of Plants, e. g. of the Upright 
Mallow. . . 320. 
* * 
V. Ex- 
