Note 155 — Chapter V · THE THEORY OF IONIZATION. II Ionization and Osmotic Pressure. Ionization and Chemical Activity
Reading edition
The negative results obtained with aluminium and magnesium are possibly more interesting than the positive action observed with zinc, but their inactivity may be due to thin films of protective chloride or oxide or to a passive condition (vide Smith's Inorganic Chemistry, pp. 723, 753; College Chemistry, p. 475).