Sundial 日晷

In this space information on the sundials which I know of or have seen in person will be posted. 說明一些日晷的基本原理。介紹一些我見過的日晷。 希望大家對日晷有更正確的認識，都能製作正確的日晷。 General principles and examples of sundials will be given here with the hope that sundials be read or made correctly.

關於我自己

我喜歡金剛經和維摩詰經。希望大家願意對我多指導。從清大化學系退休以後又對日晷生了興趣。很願意將我所知的日晷與你分享。