Aëronautics, see [Balloon company]
Air, distribution of warm—society [10]
Aluminium, ulterior advantages of [14]
Arago, French savant, forestaller of telegraphy [19]
Arcades, general [11]
Arnhem’s rise and fall as a city [93]
Bacon’s letter: “De mirabili potestate artis et naturae” [4]
Balloon, General—company [58]
Bikkers on “The philosophy of verbal monopoly” [73]
Books of the nineteenth century [34]