Note 3089 — Chapter XXI · ROMAN POTTERY: TECHNICAL PROCESSES, SHAPES, AND USES
Reading edition
Brongniart, Traité, i. p. 421; Blümner, Technologie, ii. p. 91. See also Handbook to Collection of Pottery in the Museum of Practical Geology, 1893, p. 65, for an analysis made on a fragment of glazed red ware by Dr. Percy:
Silica 54·45
Alumina 22·08
Peroxide of iron 7·31
Lime 9·76
Magnesia 1·67
Potash 3·22
Soda 1·76
———
100·25
======