Porcelain wares containing calcined bone ash and gypsum in their pastes were some of the most commercially successful high-fired wares produced in Britain and America during the third quarter of the 18th century. They were produced by the two earliest porcelain manufactories in America (the Bartlam and the Bonnin & Morris factories) and by several British manufactories, including the largest such enterprise (Bow) and another London factory (Isleworth). Owing to the influence that London manufacturers had on contemporary and later porcelain producers elsewhere in Britain and in America, major, minor, and high-precision trace-element data were determined for pastes and glazes of potsherds from the sites of these factories so that compositional commonalities and differences could be ascertained. Multidimensional scaling of major- and minor-element data for 34 samples of these wares generates diagrams on which the products of the four factories under consideration cluster relatively tightly as compared with diagrams created using only trace elements and all analytical data (major, minor, and trace elements). The coupling of geochemically unaffiliated components (or ratios thereof), including trace elements, however, tends to generate the best field separation on discrimination diagrams for these wares. The American and British phosphatic porcelains described here can readily be distinguished based on the concentrations of various paste components; rubidium vs. arsenic and tin, for example, best distinguishes Bartlam from Bonnin & Morris and their London counterparts.

在 18 世纪第三季度，英国和美国生产的一些商业上最成功的高烧瓷器在其糊状物中含有煅烧骨灰和石膏的瓷器。它们是由美国最早的两家瓷器制造商（巴特拉姆和 Bonnin & Morris 工厂）以及几家英国制造商生产的，其中包括最大的此类企业（Bow）和另一家伦敦工厂（Isleworth）。由于伦敦制造商对英国和美国其他地方的当代和后来的瓷器生产商的影响，对这些工厂所在地的陶片糊料和釉料进行了主要、次要和高精度微量元素数据的测定，以便确定其成分。可以确定共性和差异。对这些商品的 34 个样品的主要和次要元素数据的多维缩放生成图表，与仅使用痕量元素和所有分析数据（主要、次要和微量元素）。然而，包括微量元素在内的地球化学非关联成分（或其比率）的耦合往往会在这些商品的鉴别图上产生最佳的场分离。此处描述的美国和英国磷酸盐瓷可以根据各种膏体成分的浓度轻松区分；例如，铷与砷和锡最能将 Bartlam 与 Bonnin & Morris 及其伦敦同行区分开来。