out in the dark and press the first of a row of buttons. There were three rows of such buttons. The concealed lighting that spilled from the huge bowl under the ceiling revealed a sleeping-porch, three sides of which were fine-meshed copper screen. The fourth side was the house wall, solid concrete, through which French windows gave access.
concentered at a particular place on the concrete wall, illuminating, in a row, a clock, a barometer, and centigrade and Fahrenheit thermometers. Almost in a sweep of glance he read the messages of the dials: time 4:30; air pressure, 29:80, which was normal at that altitude and season; and temperature, Fahrenheit, 36°. With another press, the gauges of time and heat and air were sent back into the darkness.