[ 8l S ] 
meters would make them fo. But this is not fuffi- 
eient to make thofe diameters anfwer to 3 feet of 
5)64! parts, of which they want almoft -fo of a Paris 
inch. This may be partly an error in the workman- 
ship, and partly in Defgodetz’s meafure ; but if this 
quantity were added to them, they would not only 
anfwer to the fame foot with the reft of the building, 
but all the parts in which their meafure is included* 
would agree better with the depth of the folid, and 
the widths of the entrances. 
The height of the blocking was probably intended 
for 2 Roman feet, though it anfwers to no greater 
meafure of that foot than the diameters of the co- 
lumns do. But meafures of 2, 3, and 4 feet, fel- 
dom agree with the larger ones in any of the build- 
ings ; for a fmall error, either in the workmanfhip, 
or in the meafuring, makes a very fenfible difference 
in the length of the foot derived from fuch intervals. 
And this blocking does not want the 77 part of a 
London inch, of 2 feet of 96 f parts each. 
The bankers arch, and the portico of Severus, are 
contemporary buildings with this, and feem to agree 
with it in the meafure of the foot. The former is a 
very fmall building, and its parts will not anfwer to 
any one common meafure by divifors of whole digits-. 
However, the depth of the folid (which, as I have 
before obferved, is moft likely to be a whole mea- 
fure) taken at three different parts, is 6 feet 4 inches, 
which anfwer to 7 Roman feet of 963, .93 London 
parts. 
There are but few meafures in the portico of Se- 
verus. Thofe moft to be depended on are, the whole 
extent in front, and the ftiafts of the columns, which 
are 
