Learning to Steer.
XIII. Peculiarities of Aeroplane Power
Pressure of the Wind--How to Determine Upon
Power--Why Speed Is Required--Bird find Flying
Machine Areas.
XIV. About Wind Currents, Etc.
Uncertainty of Direct Force--Trouble With Gusty
Currents--Why Bird Action Is Imitated.
XV. The Element of Danger
Risk Small Under Proper Conditions--Two Fields
of Safety--Lessons in Recent Accidents.
XVI. Radical Changes Being Made
Results of Recent Experiments--New Dimensions
--Increased Speed--The One Governing Rule.
XVII. Some of the New Designs
ù Automatic Control of Plane Stability--Inventor
Herring's Devices--Novel Ideas of Students.
XVIII. Demand for Flying Machines
Wonderful Results in a Year--Factories Over-
crowded with Orders.
XIX. Law of the Airship
Rights of Property Owners--Some Legal
Peculiarities--Danger of Trespass.
XX. Soaring Flight
XXI. Flying Machines vs. Balloons
XXII. Problems of Aerial Fligh
XXIII. Amateurs May Use Wright Patents
XXIV. Hints on Propeller Construction
XXV. New Motors and Devices
XXVI. Monoplanes, Triplanes, Multiplanes