 The technique was invented in 1957 by German biologist Dietrich Schneider and shares similarities with electro-olfactography.Electroantennography is usually performed either by removing an antenna from the animal and inserting two chlorided silver wires for contact onto the two ends and amplifying the voltage between them while applying an odor puff to see a deflection as in the figure, or by leaving the animal intact and inserting a ground wire (silver/silver chloride) or a glass electrode filled with a buffer solution to some part of the body, usually inserted into an eye, and another to the tip of the antenna.A large bore glass electrode can also be placed directly over the tip of the antenna, such as in "Drosophila melanogaster" (fruit fly) antenna recordings.