Wiktionary
electroscopes
n. (plural of electroscope English)
Usage examples of "electroscopes".
Carrying the box of electroscopes and Monk's portable laboratory, which was contained in metal cases, Doc Savage was almost across the rope before he—the load, rather—was seen from the street below.
In the newspapers also was the matter of the telephone call concerning the electroscopes which Doc Savage had made.
These are miniature, supersensitive electroscopes, which register the circuits which propel the device in that direction.
I want you to change the films and develop them and check the electroscopes according to the dose in the manual.