A Prospecting Device

Date: Unknown
Credits: BAnQ Rouyn-Noranda, fonds Ministère des Ressources naturelles, mine series. 08Y,E20,S2,SS1,P1556.
A prospector, whose name is unknown, uses a device to find buried ores in the soil. Unfortunately, this method does not work for gold: one has to dig trenches for the precious metal to be found.