![This thermometer belonged to my great-grandfather. What are the substances at the bottom? The red liquid and tiny metal balls? (It's about 5 inches long) : r/Whatisthis This thermometer belonged to my great-grandfather. What are the substances at the bottom? The red liquid and tiny metal balls? (It's about 5 inches long) : r/Whatisthis](https://preview.redd.it/this-thermometer-belonged-to-my-great-grandfather-what-are-v0-99gxk5flw07b1.jpg?width=640&crop=smart&auto=webp&s=d259689706b2fce531df996fe13191200a404c18)
This thermometer belonged to my great-grandfather. What are the substances at the bottom? The red liquid and tiny metal balls? (It's about 5 inches long) : r/Whatisthis
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