Wiktionary
hygrometers
n. (plural of hygrometer English)
Usage examples of "hygrometers".
Sitting there he heard a crash and a confused tumbling, and when he came out he found that Stephen had fallen off the chair from which he was trying to catch a spider under the skylight and had not only flung sea-water all over his records but had broken an improbable number of instruments - hygrometers, seven different kinds of thermometer, Crompton's device for measuring specific gravity: practically everything made of glass.