Chiefly reviews written by Helen Megaw, 1951-75; also correspondence and papers concerning articles contributed by H M to various publications and revisions of existing works, including 'The Crystalline State', 1947, 'Encyclopedia Americana', 1969, dictionaries of physics, 1958-63, and a contribution to the 14th edition of Kaye and Laby, 'Tables of Physical and Chemical Constants', 1971-73. The file also contains an article concerning a symposium held in honour of Dr W H Taylor, 1971.