Historical contribution
What Thomson contributed
William Thomson's mirror galvanometer detected very weak currents on long submarine cables and supported lower-voltage reception, linking cable engineering to improved electrical measurement.
Why it mattered
Crosses oceans through fixed near-real-time electrical paths.
Connected topics
Where this fits in ITEM
Evidence
Sources and further reading
- Mirror galvanometer for the transatlantic telegraph, 1858:
Science Museum Group · 1858