Signedstenciled on each bulb: THE SCALEBUOY CO
Inscribedon each bulb on seal: TESTED AND / GUARANTEED / Patent Applied for / U.S.A.
FunctionThis is likely a hoax from the 1930s. It was claimed that these bulbs ("scalebuoys") with mercury inside somehow produced electric charges and radiation that was beneficial for all sorts of medical, sanitary, industrial and other purposes, mostly related to water purification.
It is unknown what the particular "magic wand" rod with the buoy cage included in this package was intended for.
To see other uses of this hoax, look at the other Scalebuoys in the collection.