Papers discuss science-related advances in conservation and restoration treatments and materials, and the contribution of science to the technical examination that should precedetreatment. For individual abstracts see 19-872, 19-886, 19-919, 19-923, 19-928, 19-946, 19-1198, 19-1244, 19-1260, 19-1271, 19-1274, 19-1275, 19-1283, 19-1299, 19-1422, 19-1471, 19-1482, 19-1590, 19-1593, 19-1607, 19-1622, 19-1623, 19-1627, 19-1636, 19-1640, 19-1646, 19-1655, 19-1664, 19-1751, 19-1771, 19-1775, 19-1860, 19-1874, 19-1875, 19-1881, 19-1904, 19-1924 and 19-1932. -- AATA