UNIVERSITY OF VIRGINIA PUBLICATIONS 



BULLETIN 



PHILOSOPHICAL SOCIETY 



Scientific Series, Vol. I, Xo. 9, pp. 231—242, February, 1012 



On a Certain Quadratic Form Tv^itli its Greometric 

 and Kinematic Interpi'etations 



WILLIAM H. ECHOLS 



/ 



UNIVERSITT OF VIUGI^riA ^^_.;,.- 



CharlotteBTille.T'irginia, TJ.S. A. /*'\\SsOn! 



