[1]With very few exceptions all the works referred to in this notice will be found in the Wheeler Collection in the Library of the American Institute of Electrical Engineers, New York.
[2]It is probable that Flavio Gioja, an Italian pilot, some fifty years later, added the compass-card and attached it to the magnet.
[3]Annali di Matematica Pura ed Applicata, 1865.
[4]A terrella, or earthkin.
[5]The Chronicles and Memoirs of Great Britain and Ireland during the Middle Ages, by Thomas Wright (1863).
[6]The pole-star was thus named in the south of France and the north of Italy because seen beyond the mountains (the Alps).
