xiv INDEX TO DEFINITIONS. 



SECT. 



Pitch, . . l 



Pitch Conic, . . 19 



Pitch Quadric, . "9 



Polar Screws, . . . . * * 



Potential Screw Complex, . . . . . . ! 49 



Principal Screws of Inertia, 45 



Principal Screws of the Potential, 68 



Reciprocal Plane, [ H* I * - I ; 



Reciprocal Screws, .-'.'".'. . ,- 2I 



Reciprocal Screw Complex, . . . . . 4 1 



Reduced Wrench, v . - - , 6o 



Resultant Twist, . . ' . . . ..'-. - i 3 



Resultant Wrench, 5 



Screw, - . * 



Screw Complex, . . . . .' . 3 



Screw Complex of the First Order, . . -.' . . ,. . 83 



Screw Complex of the Second Order, . . . .... 9 2 



Screw Complex of the Third Order, . . . . . * i 



Screw Complex of the Fourth Order, . . .' ' . . : ' . . H7 



Screw Complex of the Fifth Order and First Degree, . ' . s , ' . . 95 



Screw Complex of the Fifth Order and Second Degree, . '. ^ . 9 6 



Screw Complex of the Sixth Order, . . . .'.,'. . '57 



Screw Complex of the (n- i y h Order and Second Degree, . . . 158 



Screw Reciprocal to a Cylindroid, . . .. . ." 2i 



Sexiant, . . . . ' . : X 5' 



Twist, . . . . ' 



Twisting Motion, . . - * '' 



Twist Velocity, ib - 



Virtual Co-efficient, ^ /' . . . . - : . ' . . . ^3 



Wrench, 4 



Wrench evoked by Displacement, . . . . 64 



