C S97 ) 
Dublin. But the Dedu&ion from thofe Bills of Mor- 
tality feemed even to their Authors to be defective : 
Firft, In that the Number of the People was wanting. 
Secondly, That the Ages of the People dying was not 
to be had. And Laftly, That both London and Dublin 
by reafon of the great add cafual Acceffion of Strangers 
who die therein,(as appeared in both, by the great Excefs 
of the Funerals above the Births') rendred them incapable 
of being Standards for this purpofe ; which requires, if 
it were poffible, that the People we treat of fhould not 
at all be changed, but die where they were born, with- 
out any Adventitious Increafe from Abroad, or Decay 
by Migration elfewhere. 
This Defeft feems in a great meafure to be fatisfied 
by the late curious Tables of the Bills of Mortality at 
the City of Brejlaw, lately communicated to this Ho- 
nourable Society by Mr. Juftell, wherein both the Ages 
and Sexes of all that die are monthly delivered, and 
compared with the number of the Births, for Five 
Years laft paft, viz. 1687, 88, 89, 90, 91, feemingto 
be done with all the Exa&neft and Sincerity pot 
fible. 
This City of Brejlaw is the Capital City of the Pro- 
vince of Silefia ; or, as the Germans call it, Schlefia, 
and is fcituated on the Weftern Bank of the River Oder, 
anciently called Viadrus ; near the Confines of Germany 
and Poland, and very nigh the Latitude of London, 
It is very far from the Sea, and as much a Mediterra- 
nean Place as can be defired, whence the Confluence of 
Strangers is but fmall, and the Manufacture of Liiinen 
employs chiefly the poor People of the place, as well 
2s of the Country round about 5 whence comes that 
fort of Linnen we ufually call your Sclefie Linnen; which 
is the chief, if not the only Merchandize of the place. 
For thefe Reafons the People of this City feem moft pro- 
C % per 
