It has got to be rare for an Englishman to go out and photograph his rain.

3mm in case you can't read the mucky scale. Light rain all night water barrels are full. Still hopes for more.
Now, if I was to sow 200 Runner Beans in 200 pots of compost and sat back to wait for them to show, only to find 50% of the seed was not viable would I be happy.
A viability test gives confidence that everything is going well. Going back to first school, do you remember the jam jar and blotting paper and growing a bean, I do.
This principle is similar, 10 seeds laid on their sides on some vermiculite or whatever, which is kept moist.

Note where the root emerges from, top of the scar, other end to the two bumps. Note also the seeds were on their sides so the root is having to turn either left or right.
