Waves can also be separated into transverse and longitudinal waves. In a transverse wave, the motion of the particles of the medium is at right angles (i.e., transverse) to the direction the wave moves.
The experiment's name comes from the Tuskegee Institute, the black university founded by Booker T. Washington. Its affiliated hospital lent the PHS its medical facilities for the study, and other predominantly black institutions as well as local black doctors also participated.
Carver had been frugal in his life, and in his seventies he established a legacy by creating a museum of his work, as well as the George Washington Carver Foundation at Tuskegee in 1938 to continue agricultural research.