关于元大都高表结构的一种推测

文章研究了假定设在大都由元代郭守敬设计的高表可能的铸造方法和安装问题,并认为郭守敬只作了高表设计而未实际铸造,设在大都的高表应与登封的一样,仅在40尺高的堂顶围栏架一横梁。堂为晷影堂,在表之南。堂、表、圭正南北排列。

A Conjectural Construction of the Giant Chinese Gnomon in Dadu of the Yuan Dynasty

The paper re studies the gaobiao (gian t Chinese gnomon)designed by the astronomer Guo Shoujing (1231 1316)at the beginning of th e Yuan Dynasty.Based on a his discussion of what a possible method might be used by Guo to cast and install the giant Chinese gnomon,providing that the gnomon h ad been indeed made by Guo Shoujing,the author argues that Guo Shoujing had only designed but not cast the gnomon.He thinks that the so called Giant Gnomon use d in Dadu(today's Beijing)should be the same as that at the old Observatory in Dengfeng,Henan,that is,a cross bar (heng liang) installed on the top railing o f th e Guiying Tang(Gnomon Shadow Hall)was instead of the Giant Gnomon.The Hall,Gnomon and Gnomon Shadow Template( gui )were arranged in a line from south to north direction.