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Technology Type Prevalence by Period
BOF Annual Reports, 1897–1908 · 13 categories of subjects considered · 1,691 classified subjects total. Original analysis by Tanisha.
 0 50 100 150 200 250 300 350 400 Number of subjects 1897-98: Aerial / Aviation — 29 subjects 1897-98: Artillery & Guns — 68 subjects 1897-98: Projectiles & Ammunition — 130 subjects 1897-98: Explosives & Propellants — 23 subjects 1897-98: Torpedoes & Mines — 42 subjects 1897-98: Range Finding & Fire Control — 17 subjects 1897-98: Wireless & Electrical — 4 subjects 1897-98: Armor & Fortification — 23 subjects 1897-98: Searchlights & Optics — 2 subjects 1897-98: Small Arms — 9 subjects 1897-98: Transportation & Vehicles — 2 subjects 1897-98: Other — 48 subjects 29 68 130 23 42 17 4 23 2 9 2 48 397 1898-99: Aerial / Aviation — 51 subjects 1898-99: Artillery & Guns — 39 subjects 1898-99: Projectiles & Ammunition — 22 subjects 1898-99: Explosives & Propellants — 9 subjects 1898-99: Torpedoes & Mines — 6 subjects 1898-99: Range Finding & Fire Control — 12 subjects 1898-99: Wireless & Electrical — 5 subjects 1898-99: Armor & Fortification — 4 subjects 1898-99: Searchlights & Optics — 2 subjects 1898-99: Small Arms — 4 subjects 1898-99: Transportation & Vehicles — 2 subjects 1898-99: Entrenching & Field Equip. — 3 subjects 1898-99: Other — 20 subjects 51 39 22 9 6 12 5 4 2 4 2 3 20 179 1900-01: Aerial / Aviation — 1 subjects 1900-01: Artillery & Guns — 38 subjects 1900-01: Projectiles & Ammunition — 27 subjects 1900-01: Explosives & Propellants — 9 subjects 1900-01: Torpedoes & Mines — 3 subjects 1900-01: Range Finding & Fire Control — 9 subjects 1900-01: Wireless & Electrical — 2 subjects 1900-01: Armor & Fortification — 3 subjects 1900-01: Searchlights & Optics — 3 subjects 1900-01: Small Arms — 4 subjects 1900-01: Transportation & Vehicles — 3 subjects 1900-01: Entrenching & Field Equip. — 10 subjects 1900-01: Other — 13 subjects 1 38 27 9 3 9 2 3 3 4 3 10 13 125 1901-02: Aerial / Aviation — 5 subjects 1901-02: Artillery & Guns — 53 subjects 1901-02: Projectiles & Ammunition — 28 subjects 1901-02: Explosives & Propellants — 7 subjects 1901-02: Torpedoes & Mines — 3 subjects 1901-02: Range Finding & Fire Control — 13 subjects 1901-02: Wireless & Electrical — 8 subjects 1901-02: Armor & Fortification — 9 subjects 1901-02: Searchlights & Optics — 3 subjects 1901-02: Small Arms — 14 subjects 1901-02: Transportation & Vehicles — 5 subjects 1901-02: Entrenching & Field Equip. — 10 subjects 1901-02: Other — 52 subjects 5 53 28 7 3 13 8 9 3 14 5 10 52 210 1903-04: Aerial / Aviation — 18 subjects 1903-04: Artillery & Guns — 52 subjects 1903-04: Projectiles & Ammunition — 22 subjects 1903-04: Explosives & Propellants — 8 subjects 1903-04: Torpedoes & Mines — 9 subjects 1903-04: Range Finding & Fire Control — 17 subjects 1903-04: Wireless & Electrical — 2 subjects 1903-04: Armor & Fortification — 17 subjects 1903-04: Searchlights & Optics — 10 subjects 1903-04: Small Arms — 9 subjects 1903-04: Transportation & Vehicles — 5 subjects 1903-04: Entrenching & Field Equip. — 8 subjects 1903-04: Other — 41 subjects 18 52 22 8 9 17 2 17 10 9 5 8 41 218 1904-05: Aerial / Aviation — 4 subjects 1904-05: Artillery & Guns — 38 subjects 1904-05: Projectiles & Ammunition — 18 subjects 1904-05: Explosives & Propellants — 5 subjects 1904-05: Torpedoes & Mines — 12 subjects 1904-05: Range Finding & Fire Control — 14 subjects 1904-05: Wireless & Electrical — 1 subjects 1904-05: Armor & Fortification — 11 subjects 1904-05: Searchlights & Optics — 7 subjects 1904-05: Small Arms — 5 subjects 1904-05: Entrenching & Field Equip. — 7 subjects 1904-05: Other — 17 subjects 4 38 18 5 12 14 1 11 7 5 7 17 139 1905-06: Aerial / Aviation — 7 subjects 1905-06: Artillery & Guns — 31 subjects 1905-06: Projectiles & Ammunition — 20 subjects 1905-06: Explosives & Propellants — 1 subjects 1905-06: Torpedoes & Mines — 8 subjects 1905-06: Range Finding & Fire Control — 18 subjects 1905-06: Armor & Fortification — 6 subjects 1905-06: Searchlights & Optics — 5 subjects 1905-06: Small Arms — 7 subjects 1905-06: Transportation & Vehicles — 4 subjects 1905-06: Entrenching & Field Equip. — 3 subjects 1905-06: Other — 23 subjects 7 31 20 1 8 18 6 5 7 4 3 23 133 1906-07: Aerial / Aviation — 8 subjects 1906-07: Artillery & Guns — 32 subjects 1906-07: Projectiles & Ammunition — 23 subjects 1906-07: Explosives & Propellants — 3 subjects 1906-07: Torpedoes & Mines — 5 subjects 1906-07: Range Finding & Fire Control — 10 subjects 1906-07: Armor & Fortification — 9 subjects 1906-07: Searchlights & Optics — 22 subjects 1906-07: Small Arms — 4 subjects 1906-07: Entrenching & Field Equip. — 1 subjects 1906-07: Other — 25 subjects 8 32 23 3 5 10 9 22 4 1 25 142 1907-08: Aerial / Aviation — 13 subjects 1907-08: Artillery & Guns — 25 subjects 1907-08: Projectiles & Ammunition — 22 subjects 1907-08: Explosives & Propellants — 4 subjects 1907-08: Torpedoes & Mines — 8 subjects 1907-08: Range Finding & Fire Control — 15 subjects 1907-08: Wireless & Electrical — 3 subjects 1907-08: Armor & Fortification — 7 subjects 1907-08: Searchlights & Optics — 10 subjects 1907-08: Small Arms — 3 subjects 1907-08: Transportation & Vehicles — 4 subjects 1907-08: Other — 34 subjects 13 25 22 4 8 15 3 7 10 3 4 34 148 1897-98 1898-99 1900-01 1901-02 1903-04 1904-05 1905-06 1906-07 1907-08 BOF reporting period Aerial / Aviation Artillery & Guns Projectiles & Ammunition Explosives & Propellants Torpedoes & Mines Range Finding & Fire Control Wireless & Electrical Armor & Fortification Searchlights & Optics Small Arms Transportation & Vehicles Entrenching & Field Equip. Other