It is, however, possible that the interval c and the wing arches may have been intended to be similar; for one of the wing arches measures 5 ft. 4 in. We have thus a simpler proportion than any we have hitherto met with; only two losses taking place, the first of 2 ft. 2 in., the second of 6 inches.

The upper story has a central group of seven arches, whose widths are 4 ft. 1 in.

Ft.In.
The next arch on each side35
The three arches of each wing36

Here again we have a most curious instance of the subtlety of eye which was not satisfied without a third dimension, but could be satisfied with a difference of an inch on three feet and a half.

§ IX. In the Terraced House, the ground floor is modernized, but the first story is composed of a centre of five arches, with wings of two, measuring as follows:

Ft.In.
Three midmost arches of the central group40
Outermost arch of the central group46
Innermost arch of the wing410
Outermost arch of the wing[43]50

Here the greatest step is towards the centre; but the increase, which is unusual, is towards the outside, the gain being successively six, four, and two inches.

I could not obtain the measures of the second story, in which only the central group is left; but the two outermost arches are visibly larger than the others, thus beginning a correspondent proportion to the one below, of which the lateral quantities have been destroyed by restorations.

§ X. Finally, in the Rio-Foscari House, the central arch is the principal feature, and the four lateral ones form one magnificent wing; the dimensions being from the centre to the side: