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Corning scientist Jesse Littleton brought a sawed-off battery jar to his wife, Bessie, who baked a sponge cake in it.

Then Brutus beats him to death with various office implements and everyone dies in a bloody battle fought with swords dipped in the battery jar.

The copper sulphate solution, being the heavier of the two, rests at the bottom of the battery jar, while the dilute sulphuric acid remains at the top.

By placing crystals of blue vitriol in the battery jar, the solution of blue vitriol can be kept up to its full strength for a very long time.

The same plan may be adopted with wide glass jars, like the ordinary battery jar.