Homestake experiment

Pioneering solar neutrinos - Ray Davis shows John Bahcall
the tank containing 100 000 gallons of perchloroethylene.
The picture was taken in the Homestake mine shortly
before the experiment began operating.
International Journal of High-Energy Physics

Pioneering solar neutrinos - Ray Davis shows John Bahcall
the tank containing 100 000 gallons of perchloroethylene.
The picture was taken in the Homestake mine shortly
before the experiment began operating.