李淳风的《历象志》和《乙巳元历》

LI CHUNFENG'S "LI XIANGZHI" AND "YISI YUAN LI"

唐初天文学家李淳风撰《麟德历》,受到各代历家的重视。但他的另一部历法《乙巳元历》却鲜为人知,记载这部历法的《历象志》也已佚失。1934年朱文鑫著《历法通志》,收录102种古历,未提此历。1960年钱宝琮著《从春秋到明末的历法沿革》,也未述及此历。1981年薄树人主编的《中国天文学史》,附录94种古历,亦不载此历。

The Linde Calendar of Li Chunfeng, an astronomer of the early Tang Dynasty, has long been thought of highly in astronomical circles. However, people know very little about his Yisi Yuan Li (calendar), while the Li Xiang Zhi in which it is recorded was also lost. The author has found in recent years relevant material, thus gaining a clear idea of its general picture, and by comparing the Yisi Yuan Li with the Linde Calendar expounds its impact on the evolution of calendar in China.