natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"
alter, change, modify - cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue"
magnetize, magnetise - make magnetic; "The strong magnet magnetized the iron shavings"
There is a First World War rangefinder pillar on the east side of the island and the present bird hide on the east side of the lighthouse was built as a degaussing station, used to demagnetise ships and protect them from mines.
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