The float and net needle belonged to Ragnar Granit, who enjoyed fishing alongside his research into sensory mechanisms and neurophysiology. The initials RG on the net needle were engraved by Granit himself. The equipment is from the Granit family's summer cottage on the island of Korppoo outside Turku in Finland. Ragnar Granit spent many summers there, cleaning seaweed from the nets. His research colleagues who came to visit him from all over the world also helped out.
The float and net needle was donated to the Nobel Prize Museum by Ragnar Granit's family in 2024.
