First attempt at sodium/ potassium thermometer (Patreon)

first attempt at a Sodium/potassium thermometer. The bulb is beautiful! Its just so incredibly shiny! It sort of works as a thermometer, in that the metal moves around when the bulb is heated. However the metal in this case formed a skin, and adheres to the glass. I strongly suspect that for this to work everything is going to have to be done under v. high vacuum condition.