They are for building an Interocitor, of course.  (This Island Earth, 1952.)
🙂

On 3/6/2024 10:34 PM, Hubert Miller wrote:
I bought some manufacturer's sample boxes of SMT caps at Seaside OR hamfest last year. A set of 12 small thimble size vials. I looked at one and thought, "Why is there a little dirt in this vial?" The grains of "dirt" were capacitors. If you drop any on the floor, they are gone daddy gone.
Hue Miller