| 摘要 |
The invention reltes to a pocket sundial which does not need to be set prior to its use. It consists of a cylindrical ring obscured on one side by an integral or removable edging. The device is provided, at the top of its vertical axis, with a suspension eyelet 1. A slot 3 made in its periphery, perpendicularly to the edging, allows through the solar rays 6 which are projected in the form of a luminous line on a graduated vertical design 5. <IMAGE>
|
