The peculiar sound that filled the air was the hum of the interrupter; the bulb was, of course, a Crookes tube, and the red spot inside it, the glowing red-hot disc of the anti-cathode.

its bulb was a palpitating heart of human flesh; or how Bhanavar called the unwilling serpents too often, and failed to win her beauty back, till, at an awful price

" "What's that?" "Why, bulbs are such fat creatures that they don't need the outside food they would get from earth; all they want is plenty of water.