Cambridge, England: Royal Society of London, 1949. Hardcover. First Edition. iv, 140 pp. 8vo. Gray paper wraps with library stamp in red at upper right corner of cover, small note in pencil at foot of cover. Interior clean. Very Good.
Sir John Lennard-Jones (1894–1954) showed how to use the “linear combination of atomic orbitals” (LCAO) approximation for molecular orbitals to derive the electronic structure of complex molecules such as fluorine and oxygen in addition to simpler molecules.