Notes on the Principles of Quadrupedal Locomotion and on the Mechanism of He Limbs in Hoofed Animals

Factors of long distance travelllng power I n ungulates . . . . . . . . . . . . . . . . . . 270 Endurance ......................................... ............ 271 Adaptations for mlulmlrlng waste of energy ........................ 271 Momentum ................ 271 Propulslon and the center of grnvlty ........ Sinuous movement of the body In runnlug ........................ 272 Spiral conflgurotion of limb bones and artlcular surlnces .......... 273 Lost motion .................................................... 273 Pendulum action of the Ilmbs .................................... 273 speed .............................................................. 273 Length of stride ................................................... 274 Length of limb ........ ....... . . . . . . . . . . . 274 Angle of stride ........ ....... ........... 274 Accelerntion Increment e to bal f limbs . . . . 274 Rapidity of strlde ...................................... : .......... 276