It has been dry in eastern Massachusetts and, as a consequence, we have been watering the tomatoes. There are two ways to water tomatoes. One is to take the hose or watering-can and go from plant to plant, watering each in 'series'. The other is to spray the entire patch, watering all the plants at the same time in 'parallel'. If visitors arrive after the job is done the tomato patch will obviously be wet, but it will not be clear whether the deployment of water was serial or parallel.
展开▼
