So, yesterday we were at the hardware store and I bought a package of tomato seeds - and, as we live in an apartment, I chose patio tomatoes. I "planted" them today between glass and paper towels, six seeds per glass. In the container labeled "M" I am putting water that was boiled in our microwave oven. The one labeled "K" uses water boiled in our electric kettle. The water is at room temperature, of course, and is stored in glass containers. The paper towels absorb the water from the bottom of the glass, and so the seeds are being kept moist.
Over the next few weeks I shall periodiodically add new photographs so you can follow the progress of this little test.