Signedon top of case: NALDER BROs & Co / LONDON / No 3466
FunctionThe ballistic type galvanometer is a moving coil galvanometer that measures electric charge, but its coil is specially designed with less torque and higher inertia and its mirror is deflected in a way that is proportional to the total charge passing through the moving coil.
ProvenanceFrom the Department of Physics, Harvard University, 12/18/1956.