Mantell, Dr., his "Wonders of Geology," see notes by Translator, 45, 64, 203, 274, 278, 281, 283, 284, 287; "Medals of Creation," 46, 271, 283, 287.
Margarita Philosophica by Gregory Reisch, 58.
Marius, Simon, first described the nebulous spots in Andromeda and Orion, 138.
Martins, observations on polar bands, 198; found that air collected at Faulhorn contained as much oxygen as the air of Paris, 312; on the distribution of the quantity of rain in Central Europe, 333; doubts on the greater dryness of mountain air, 334.
Matthessen, letter to Arago on the zodiacal light, 142.
Mathieu on the augmented intensity of the attraction of gravitation in volcanic islands, 167.
Mayer, Tobias, on the motion of the solar system, 146, 148.
Mean numerical values, their necessity in modern physical science, 81.
Melloni, his discoveries on radiating heat and electro-magnetism, 49.
Menzel, unedited work by, on the flora of Japan, 347.