( 45 ^ ) 
London will be to that of Tarts as 60 to £ 6 , or as is 
to 14 ; or London will be one fourteenth greater than 
Taris. But to determine what Proportion thefe two 
Cities really bear to each other, requires a more ex- 
ad: Menfuration of London than any w.e yet have, 
which whoever would undertake, 1 think he cannot 
follow a better Method than that Mr. de Ltjle has 
taken, and would advife him to confult the Ac- 
count upon which the foregoing Reftedions are 
made, which he may find in the Memoires of the 
Royal Academy of Sciences , for the Year 1715* 
M- 48. 
IV. An Account of an Aneuryfm of the Aorta, (dif- 
fered in St. Bartholomew's Hofpital) hy Pierce 
Dod, M. V. Fellow of the College of Tbyjicians, 
and Phyjician to that Hofpital. 
A N Aneuryfm, without Doubt, is a Tumour arifing 
from fome Diforder in an Artery ^ but what that 
Diforder is, or whence it arifes, is not fo well agreed, 
the Accounts which are given of it, being widely dif- 
ferent and uncertain. 
The Name feems to imply, that it is a Dilatation of 
the Veffel j but Galen defcribes it to be a Tumour, 
which arifes not from any Dilatation or' Relaxation of 
an arterial Veffel, and the Blood therein contain’d j but 
from an Extravafation of the Blood from fome Rupture 
of the Artery. 
Agree- 
