534

*Five Essays.*

that year, they had found above 84 thousand Houses to be in *London*, wherefore *Anno* 1686, or in 4 years more, there might be ** ^{1}⁄_{10}** or 8400 Houses more (

*London*doubling in 40 years) so as the whole,

*Anno*1686 might be 92400. |24|

3. I found that *Anno* 1685, there were 29325 Harths in *Dublin,* and 6400 Houses, and in *London* 388 thousand Harths, whereby there must have been at that rate 87000 Houses in *London.* Moreover I found that in *Bristol* there were in the same year 16752 Harths, and 5307 Houses, and in *London* 388 thousand Harths as aforesaid; at which rate there must have been 123 thousand Houses in *London*, and at a Medium between *Dublin* and *Bristol* proportions 105 thousand Houses.

Lastly, By Certificate from the Harth-Office, I find the Houses within the Bills of Mortality to be 105,315. |25|

Having thus found the Houses, I proceed next to the number of Families in them, and first I thought that if there were 3 or 4 Families or Kitchins in every House of *Paris*, there might be 2 Families in ** ^{1}⁄_{10}** of the Housing of

*London*; unto which supposition, the common opinion of several Friends, doth concur with my own conjectures.

As to the number of Heads in each Family, I stick to *Grant*'s observation in page ^{[1]} of his fifth Edition, That in Tradesmen of *London*'s Families, there be 8 Heads one with another, in Families of higher Ranks, above 10, |26| and in the poorest near 5, according to which proportions, I had upon another occasion^{[2]} pitch'd the medium of Heads in all the Families of *England* to be 6⅓, but quitting the Fraction in this Case, I agree with Monsieur *Auzout* for 6.

- ↑ Page 82 of the fifth ed., p. 385 of this reprint.
- ↑ In some calculation now probably lost.

*accurate map of the city of London Ichnographically Describing all the Streets, Lanes, Alleys, Courts, Yards, Churches, Halls and Houses, &c. Actually Surveyed and Delineated By John Ogilby Esq. ... dedicated and presented by ... William Morgan,* and was accompanied by a descriptive text entitled *London Survey'd: or, an explanation of the large map of London. Giving a Particular Account Of the Streets and Lanes, in the City and Liberties. By John Ogilby & William Morgan, His Majestys Cosmographers. London, Printed and Sold at the Authors House In White Fryers,* 1677. So far as I can discover, neither the map nor the text makes any calculation of the population or of the houses of London.