Main Parts of HSG

The fundamental parts are:

• wooden or plastic body (rectangle in version 0.1.1, circle in version 0.1.2)
• polon (a stick generating the shadow, removable in later versions)
• compass (necessary to find out a South direction exactly)
• metalic or wooden joint (to let the HSG closed in “sleep-mode”, later versions contain a shelter for dismounted polon)
• metalic chain (to attach the HSG to clothing or to another stuff)
• a bubble (to keep the HSG vertically to meridian, or the plumb line in earlier versions)