Tank. The Danger to the Pilot. The Closed-in Body.
Starting the Machine. Propellers with Varying Pitch.

CHAPTER XI. FLYING MACHINE ACCESSORIES
The Anemometer. The Anemograph. The Anemometrograph.
The Speed Indicator. Air Pressure Indicator.
Determining the Pressure From the Speed.
Calculating Pressure From Speed. How the Figures
are Determined. Converting Hours Into Minutes.
Changing Speed Hours to Seconds. Pressure as the
Square of the Speed. Gyroscopic:Balance. The Principles
Involved. The Application of the Gyroscope.
Fore and Aft Gyroscopic Control. Angle Indicator.
Pendulum Stabilizer. Steering and Controlling
Wheel. Automatic Stabilizing Wings. Barometers.
Aneroid Barometer. Hydroplanes. Sustaining Weight
of Pontoons. Shape of the Pontoon.

CHAPTER XII. EXPERIMENTAL WORK IN FLYING
Certain Conditions in Flying. Heat in Air. Motion
When in Flight. Changing Atmosphere. "Ascending
Currents." "Aspirate Currents." Outstretched Wings.
The Starting Point. The Vital Part of the Machine.
Studying the Action of the Machine. Elevating the
Machine. How to Practice. The First Stage. Patience
the Most Difficult Thing. The Second Stage.
The Third Stage. Observations While in Flight. Flying
in a Wind. First Trials in a Quiet Atmosphere.
Making Turns. The Fourth Stage. The Figure 8.
The Vol Plane. The Landing. Flying Altitudes.