LIST OF ILLUSTRATIONS. 



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PAGE 



Partial Balance with Loaded Jinrikisha ,. 3 



Proposed Balance with Empty Jinrikisha . . '._ . 4 



Backward Motion of Part of Railway Carriage Wheel 6 



How Speed depends on the Set of the Sails .- ., 9 



Construction of Mysterious Spinner . ... . 14 



Home-made Gyroscope . ..... * . - 24 



Half-crown Gyroscope , : , . . * x 26 



Gyroscope resisting a Twist . . . . ., 29 



Secondary Movement caused by a Twist . ., : 32 



Equal Movement transmitted to Equal Numbers of Balls 37 



A Projectile deflected from its Course r : * * 42 



Deflection of Balls from their Course , 4 _ *,, y+ 43 



Ordinary Shape of Boomerang . . . : .-- . 48 



Vertical Deflection of Boomerang's Line of Flight ;-<> 53 



Screw Motion causing Rise in Flight of Boomerang ' .. 55 



Variations in Flight of Boomerang ., * ., ; -*x . 58 



Home-made Apparatus for Toy Boomerang . -.,* ,^.. . $., 60 



Soaring of Large Birds identical with Gliding . . 72 



Position and Action of Wings in Flying . ; W. 74 



Principles of the Hydraulic Press . . r> ,.^ : 79 



Atmospheric pressure, Capillarity, and Siphon Flow . 84 



xi 



