The old method was to visually record the physical activity going on in the experiment.

Something to record the activity of the ship on its voyage.

"It's like you had the chest open and were recording electrical activity from the surface of the heart."

I don't understand how anyone can complain about openly recording activity on private property.

The electrocardiogram is a simple test that records the electrical activity of the heart.

They were then allowed to explore, as the electrodes recorded the activity of their place cells.

A study with the goal of recording the activity that occurs in the brain during an Aha!

For nearly a century, physicians have been using the electrocardiogram to record the electrical activity of the heart on a moving paper strip.

A small tethered robot flew over, recording the activity with its own camera.

Modern well counters can automatically record activity in different samples sequentially.