List of Sidebars

2.1.	Electricity and Magnetism   15
2.2.	Generating Electricity   16
2.3.	Series and Parallel Circuits   20
2.4.	High Resistance and Low Cost   21
2.5.	The Edison Dynamo   24
2.6.	Transformers and Alternating Current   29
3.1.	Electromagnetism and Telegraphy   39
3.2.	Bell’s Harmonic Telegraph   41
3.3.	Signals and Sound   44
3.4.	Telephone: Bell and Gray   49
4.1.	Petroleum Distillation   60
4.2.	Petroleum and Chemical Reactions   68
4.3.	Thermal Pressure Cracking   70
4.4.	Catalytic Cracking   77
5.1.	The Internal-Combustion Engine   81
5.2.	The Model T: Ignition and Fuel   90
5.3.	The Model T: Engine and Power   91
5.4.	The Model T: Traction   93
5.5.	The Model T: Speed   94
6.1.	Balancing Forces in Steady Level Flight   105
6.2.	The Wright Wind Tunnel Tests   115
6.3.	The 1903 Wright Flyer: Design   119
6.4.	The 1903 Wright Flyer: Performance   122
7.1.	Hertz and Radio Waves   130
7.2.	The Radio Frequency Spectrum   133
7.3.	Modulation: Amplitude and Frequency   137
7.4.	Reception and Tuning   139
7.5.	Electronics: Diode and Triode   142
7.6.	Armstrong and Radio   144
8.1.	Horizontal and Vertical Reactions   157
8.2.	Railroad versus Automobile   159
8.3.	Ammann’s Traffic Load Estimate   166
8.4.	George Washington Bridge: Steel and Safety   167
8.5.	The Deflection Theory   168
9.1.	Three Types of Dam Design   180
9.2.	Hume Lake Dam   183
9.3.	The Hershey Arena: Horizontal Forces   191
9.4.	The Hershey Arena: Stresses   192
10.1.	Streamlining   200
10.2.	The Chrysler Airflow   204
10.3.	The Douglas DC-3   214
10.4.	The Wright Flyer and the Douglas DC-3   215