J 
[Si 2 ) 
ttru&ion of this building, yet it feems to have been^ 
lefs than any we have hitherto met with. 
The arch of Septimius Severus.. 
This building deferves our particular attention,, 
both on account of the corre&nels of the workman— 
{hip, and becaufe it exhibits a different meafure of 
the Roman foot from any of the preceding. It is all 
of white marble. The ftones are laid without mor- 
tar, and fattened together with cramps. And the. 
{hafts of the colums are each of one ftone. 
The whole extent in front, is 7 1 feet 
5 i inches, = 76161,3 
The depth at one end, is 21 feet 
8 f inches, = 23150,3 • 
The depth at the other end, 21 feet 
8|- inches, 23157,6 
The width of the middle entrance, 
20 feet 10 inches, = 22195,8 
The width of the fide entrances, 
9 feet 2 inches, = 9766,17 
From the middle entrance to the 
extremity of the outer folid, on 
one fide, is 25 feet 3I inches, 
= 26967,9 — * 
The like on the other fide, 2 5 feet 
4A inches, — 26997,5 
The diftance between the fhafts of the 
outermoft columns, is 60 feet 7-^ 
inches, = 64619,5 • — (7) 
79)... (964, 1 
24) , . . (964,6 
24) * • • (96459 
23) • • • (965 
io|) . . . (964,5. 
28) . . (963,1 
28) . . . (964,2 
67) . . . (964,5 
The 
(7) This and the two following meafures are inferted only to 
(hew the probability, that the diameters of the columns were de- 
figned 
