NOW JOIN WITH COPPER WIRE, A SCREW WITH THE COIN OF THE LEMON BE SURE IT DOES NOT BREAK WITH PLIERS TIGHTEN. BUT I MAKE THE CLARIFICATION THAT THE EXPERIMENT WORK WITH THE FIRST LEMON COIN AND SCREW THE LAST MUST NOT BE JOIN WITH ANYTHING, IS MAKE A SIMILAR ROLE TO THAT OF A PLUG.
BY INSERTING IN A LEMON WITH TWO OBJECTS MADE OF DIFFERENT METALS, FOR EXAMPLE A GALVANIZED SCREW AND COPPER COIN. THESE TWO WORK AS ELECTROCHEMICAL REACTION WITH LEMON JUICE.