XRPD and SEM-EDS Identification of a Mineralogical Standards Kit Forming a 19th Century Collection for Educational Analysis

An historical collection of more than one hundred samples of minerals and ore, used in the second half of the XVIII century was found and acquired during Munich Mineralientage 2014. The samples contained in numbered glass vials but lacking description, were prepared for teaching purpose about determinative mineralogy and ore recognition. All samples were analysed and identified. The identification effort drove the authors along a historical excursus about the didactics of mineralogy and the dry method analysis, nowadays neglected.

英国三代便携式防空导弹的设计特点

本文介绍了肖特公司研制的英国第一代、第二代、第三代便携式防空导弹吹管、标枪、流星的概况,着重介绍了每种导弹的设计特点,及其在原有基础上作了哪些改进。