342 PHILOSOPHICAL TRANSACTIONS. TanNO 1686. 



An Eclipse of the Moon, Nov. \Q, 1686; observed at Dublin, by Wm. Molyneux, 



Esq. F.R.S. N° 185, p. 236. 



\m 



A sensible penumbra at g^ 13' 



Beginning of the eclipse about ... 9 27 

 End of the eclipse 12 4 



The times were taken by a pendulum clock, corrected by the fixed stars. 

 The quantity eclipsed was about 6 digits. 



A further Assertion of the Propositions concerning the Magnitude, &c. of London, 

 contained in two Essays on Political Arithmetic, mentioned in Philos. Trans. 

 Numb. 183; with a Vindication of the said Essays from the Objections of 

 some learned Persons of the French Nation. By Sir W. Petty, Knt. R. S. S. 

 N° 184, p. 237. 



The ingenuous author of the Novelles de la Republique des Lettres, says, that 

 Rey in Persia is far larger than London ; because in the 6th century of Christi- 

 anity, I suppose an. 550, it had 15,000, or rather 40,000 Mosques or Maho- 

 metan Temples. I hope this objector is only in jest, for Mahomet was not 

 born till about the year 570, and had no Mosques till about 50 years after. 



The excellent Auzout, from Rome, is content, that London, Westminster, 

 and Southwark, with the contiguous houses, may have as many people as Paris 

 and its suburbs; and but faintly denies, that all the houses within the bills 

 may have almost as many people as Paris and Rouen ; but adds, that several 

 parishes inserted in these bills, are distant from, and not contiguous to London, 

 and that Grant so understood it. To which it may be answered, I . That the 

 London bills appear in Grant's book to have been, since the year 1 636, as they 

 now are. 2. That about 50 years since 3 or 4 parishes, formerly distant, were 

 joined by interposed buildings, to the bulk of the city, and therefore then 

 inserted in the bills. 3. That since 50 years the whole buildings, being more 

 than double, have perfected that union, so as there is no house within the said 

 bills, from which one may not call to some other house. 4. That there are but 

 three parishes under any colour of this exception, which are scarcely a two and 

 fiftieth part of the whole. 



M. Auzout alleges, that there are 23,223 houses in Paris, containing above 

 80,000 families. But, supposing 34- families to live in each of the said houses, 

 one with another, the number of families will be 81,280; and Mons. Auzout 

 allowing 6 heads to each family, the utmost number of people in Paris, accord- 

 ing to Mr. Auzout's opinion, will be 487,680. 



