Figure 4.1: F-35, Staff Sgt. Marleah Robertson, public domain, Source
Figure 4.2: Poster, U.S. National Archives and Records Administration, public domain, Source
Figure 4.3: Harrison H4 chronometer, 1767, public domain Source
Figure 4.4: Cotton Gin Diagram, public domin Source
Figure 4.5: Telegraph map, public domain Source
Figure 4.6: Berlin Wall photo, public domain Source
Figure 4.7: Nobel’s patent, public domain, Source
Figure 4.8: Nomograph, public domain, Source
Figure 4.9: Los Angeles freeway intersection, Brian Grogan, public domain, Source
Figure 4.10: Penicillin vial, Creative Commons Attribution 4.0 International license, Source]
Figure 4.11: Suez Canal satellite image, public domain, Source