instead of attempting to describe these and other examples of rotundas, we shall put our notices relative to them into a condensed form, and for convenience sake shall include those already mentioned, as their relative sizes can thereby be more readily compared.
l'antbron, Rome. External diameter 188 feet, internal 142, internal height 142. [Roues A RCIIITECTCRE.] Temple of Minerra Medico. External diameter 110 feet. Interior a decagon 78 feet in diameter and 105 high.
Susie Costanut, Rome. Extreme internal diameter 140 feet ; diameter of rotunda within the peristyle and beneath dome 70; height of dome 130.
Norera, iota Maria. Extreme internal diameter 78 feet, diameter of dome and peristyle 39, height 42.
Rotunda, Forum Caracalla. Exterior diameter about 100 feet. Corinthian portico hexastyle, triprostyle. Interior diameter 30 feet, height of order 48, entire height 00.
Rotunda at S. Pietro ho Montorio, Rome. (Bramante.) Exterior enclosed by a Doric peristyle of 16 columns. Internal diameter 22 feet, height 48. This edifice is generally admired as a classical piece of architecture, but it has many striking defects, and the balustrade (without pedestals) over the peristyle is intolerable.
Madonna di Campa;dat, Verona. (Sanmicheli.) Exterior 74 feet in diameter, nearly surrounded by a low Dorio peristyle of 28 columns, making the entire diameter below 118 feet. Interior an octagon 64 feet in diameter and 101 high.
Capella Pdligrini. Verona. (Sanmicheli.) Elegant in plan, but enormously disproportioned in section. External diameter 40 feet, internal 30. Two orders within. Height to spring of dome 46 feet, entire height 64.
La 3faddelina, Venice. (Ternanza.) Internal diameter 554 feet, height to spring of dome 36, entire height 63, or 7j more than dia meter. Arrangement hexagonal, that is, six arched compartments.
Balla des Ills, Paris. (De Mezitires.) External diameter 228 feet, interior diameter of the rotunda beneath the dome 127, height to spring of dome 42j, to summit 105.
l'ossagno. (Canes-a.) External diameter 116 feet ; width of portico 90, projection of portico 55, height of stylobate 101, internal diameter 90, height 90.
Madre di Mint), Turin. (Buonaignore.) A rotunda about 130 feet in diameter, with hexastyle, diproetyle, Corinthian portico. Internal diameter 74 feet, height 100; plan four semicircular tribunes, with two Corinthian columns in front of each, bearing the entablature continued over those spaces. Attic with a long panel over each of the four recesses.
Museum of die Vatican, Rotunda. (Sitnonetti.) Divided into ten recessed compartments : diameter 50 feet.
Radeliire Library, arfrrd. (Gibbs.) Basement a polygon of 16 ',idea, and 104 feet in diameter. Extreme exterior height 140 feet, interior diameter 88, interior diameter of central space and dome 52, height 90.
Berlin Museum, Central Hall. (Sehinkel.) Diameter 67 feet, height of gallery supported by a peristyle of twenty Corinthian columns, around the lower part 21; height to spring of dome 42 feet, entire height 70.
Catholic CloureA, Darmstadt. (Moller.) Extreme internal diameter 135 feet, peristyle of twenty-eight Corinthian columns supporting dome ; diameter of dome and peristyle 102 feet, height to spring of dome 48 feet, to summit 102.
I:eading Room, Britialt Mu sum. (S. Sinirke.) Diameter 140 feet ; height 106 feet. [Blurts)! 3Irstex.] I tO r(.E. [ M Erare. Iron, peroxide of iron.)