Precision in the X-ray fluorescence analysis of sixty-one Augustan quadrantes

Sixty-one Augustan quadrantes were analysed for calcium, iron, nickel, copper, silver, tin, antimony, and lead by X-ray fluorescence. Most coins contained about 99·7% copper with the other seven elements present as trace impurities. Significant differences in composition were found for the three different issues of quadrantes minted in c. 9 BC indicating that these issues were not minted exactly contemporaneously. Quadrantes minted in c. 4 BC have trace element concentrations in ranges that differ from those of the 9 BC quadrantes. The precision is very good for all trace elements (the precision of calcium was not calculated): average standard deviations are 0·0021% for Fe, 0·0026% for Ni, 0·0038% for Ag, 0·0014% for Sn, 0·0031% for Sb, and 0·015 for Pb.     

贝琪及其《吴学甄微》考述

上海图书馆所藏贝琪稿本《吴学甄微》承袭章太炎、梁启超、刘师培诸家论说,以人为纲,以学为纬,注重学者的授受源流、学术特质以及与吴派的相关度,考察吴派经学的源流变迁与盛衰之迹,是吴学系谱的专论之作。书末有章太炎、金天羽、陈衍诸家跋语,具有重要的史学价值。