£ 1^1 2 Num. 183, 
PHILGSOPHICAL 
T R A N S A C T I O N S. 
For the Months 6{ July, Mgufi and September 1686. 
THE C O N T E N T S. 
J fi. \ N Extract of tm Ejfays in Political Arithmetick 
l \ concerning the comfurative Magnitude $ ^ Peofky 
and Wealth of the Cities of London ^;^^iPariSj tending to prove 
that at this day the City ^London /j- the moji confiderahle- upon 
the face of the Earth, hy Sr. William Petty /^^/gk. R. S. S. 
2. Jn Hifiorical Account of tU Trade Winds and Monfbons, 
ohfervahle in the Seas between and mar the Trepicksj ivith an 
attempt to aj^gn the Fhyfical Cmfe of the faldWinds^ ^y E. 
Halley. 5. a ^Diof trick Problem, JVhy foi^r Convejc Glajfes^ 
tn a Telefcope fi^w Objects EreB y by Williana Molineux of 
Dublin ^R. Soc. 4. An uncommon Infcription lately 
found on a very gr£at Bajis ofaPi/far, dug up at R^OiTie ; ivith an 
Interpretation of she fame, by the Learned Dr. YQffms,-^, Several 
Ohfervations (f the EcMpfe of Jupiter hy the Moon on March the 
^ith, 16.86., St^ Vet. - ( whereof fom^i account has already been 
given in Tranfa^ion, No. i^i. ) viz. of Mr. CaiTiiii at Paris^, 
^/P.Bonfa at Avignon, {?/ Mr, 71mmtYmm /indM. VViirt- 
zelbauer at Nurenburg. 6. A Letter of the famous M. He- 
velius, Conful ??/Dantzick to the R. Society, containing his 
O^erv at ion of the fa/me Edipfc at Dantzick. 7. An account 
of a Book. MethodiisFigiirarum linens reftls & ciirvis com- 
prehenfamm Quad rat a '-^as determinandi. Autliore J. Craige. 
'^to. Londini, 168 5. With an addition thereto by the Author. 
T 3 An 
