Discharge tube for the observation of canal rays (anode rays).
Translated to Santali by <a href="//commons.wikimedia.org/wiki/User:R_Ashwani_Banjan_Murmu" title="User:R Ashwani Banjan Murmu">User:R Ashwani Banjan Murmu</a>
<a href="//commons.wikimedia.org/wiki/File:Canal_rays.svg" class="image"><img alt="Canal rays.svg" src="https://upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Canal_rays.svg/50px-Canal_rays.svg.png" decoding="async" width="50" height="31" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Canal_rays.svg/75px-Canal_rays.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Canal_rays.svg/100px-Canal_rays.svg.png 2x" data-file-width="1000" data-file-height="617"></a> by <a href="//commons.wikimedia.org/w/index.php?title=User:MDragunov&amp;action=edit&amp;redlink=1" class="new" title="User:MDragunov (page does not exist)">User:MDragunov</a>