By 1799 the number of Martha Washington's dower slaves had grown to 153; George Washington owned 124 people, and at least a dozen Washington-owned slaves intermarried.
Hund's rule of maximum multiplicity is a rule based on observation of atomic spectra, which is used to predict the ground state of an atom or molecule with one or more open electronic shells.
Basic principle of Xeyes. The basic idea of xeyes is simple, every time the cursor is moved calculate the direction of the cursor from the centre of each eye, then move the pupils of the eyes in the direction of the cursor, but only as far as the radius of the eye socket.