中国栽培马铃薯最早引种时间之辨析

The paper has made textual research of the writing time and the property of Miscellanies on Changan《长安客话》 and testified that“ tu dou”(土豆) was not potato in Ming dynasty. The author described the characteristics and the source of potato of Europe and of China and showed the time when they began to cultivated in China. The paper analysed the related records of the chinese ancient agricultural books and refuted the opinion that potato started to beplant in Ming dynasty, which was frequently writen in the contemporary potato monographs, the agricultural encyclopaedia and the agricultural university textbook. The author put forward that potato began to beplanted in China in 18th century and recounted its reasons.

北京碧云寺水泉院湖石掇山技法初探

水泉院地处北京西山风景区，位于香山碧云寺北轴线最深处（图1），此院落以泉取胜，院内天然流泉。据《长安客话》载：“水自寺后石岩出，喷薄入小渠，人以卓锡名之”。当时有碧云寺以泉取胜的说法。“卓锡”之名自元代起便有，明代时声名更著。清乾隆十三年（1748年）扩建碧云寺，建涵碧斋、含青斋，与同期修整的水泉院共同组成清代皇家行宫御苑（彩插图1）。