Description of Plate XXXVI.
PLAN OF THE GREAT DRAIN.
A. The Colosseum.
B. Part of the Cœlian Hill, on which the Claudium stood.
C. Part of the Palatine Hill.
a. Summa Sacra Via.
a*. Clivus Triumphalis.
b. Meta Sudans.
c. Arch of Constantine.
d d. Passage of Commodus.
e. Site on which the steam-engine was placed in 1874-5, to pump out the water coming from this point.
f. Piscina of the time of Nero.
g. Castellum Aquæ, or reservoir of Alexander Severus.
g*. Aqueduct of the third century.
h h. Exhedra of the Ludus Magnus.
i i i. Great Drain of the Colosseum, to convey the water to the Tiber.
k. The exact spot where the water runs down from the Cœlian into the Colosseum, called a natural spring, but not having the usual bubbling character of a spring.
l. Via di S. Giovanni in Laterano.
m. Via Cœlimontana.
n n n. Orto Botanico. Waste ground at the foot of the Cœlian Hill, planted with trees and shrubs, called the Botanical Garden, but not used as such.
o o. Via del Arco di Constantino. The road between the Cœlian and the Palatine Hill.
p. Podium of the colossal statue of Gordianus, 50 ft. high.