It is usually recorded from electrodes on the scalp. It can be recorded bipolarly from two electrodes placed over the same part of the cortex, or monopolarly with one “active” electrode over the cortex and a second “reference” electrode on some other part of the head.

[F]or garden it was called, though consisting but of plots of sward, bordered by fruit trees, and white rose trees not yet in blossom, […]

One must simply see that, Hear that noise, How on every side- or lower or higher- Like the country chattering of boys, Echoes and resounds the birds' dawn choir.

He wanted to throw away the cup, but he couldn't find a trash can.