Osgood, William F. (William Fogg), 1864-1943, Graustein, William C. (William Caspar), 1888-1941, joint author · New York : The Macmillan Company · leaf 449
Fig. 5 … DIRECTION COMPONENTS 431 The directed trihedral Pi-EST represents the set of direc-tion components (4). Any second set, consisting of the pro-jections on the axes, X^Xz, Y1Y2, Z1Z.2, of any seconddirected line-segment PiPJ on L is represented by the directedtrihedral P^-RST. For the two directed…
