Sodium by electrolysis through glass In his 1926 thesis Robert Cady Burts describes the production of sodium by electrolysis of sodium nitrate through glass.

I can't find much else on this method. Are there any modern descriptions of the experiment? Videos maybe?
See Shakashiri's chemical demonstrations. He carefully outlines the steps. As I recall it requires taking sodium nitrate into a molten state and applying a current. The elemental sodium is precipitated on the inside surface of an incandescent bulb.