20. Anonymous, (believed to be by Thomas Powell, D.D.) Humane Industry, or a History of most Manual Arts. Sm. 8vo. London, 1661.
21. Anonymous, (probably Professor Willis.) An attempt to Analyse the Automaton Chess player of Mr. de Kempelen. 8vo. London, 1821.
22. Cox’s Museum. Descriptive Catalogue of the Superb and Magnificent pieces of Mechanism and Jewellery in Cox’s Museum. Sm. 4to. London, 1772.
23. Henry Van Etten, Mathematicall Recreations. 12mo. London, 1633.
O. V.
A
BIBLIOGRAPHY
OF THE
PRIVATELY PRINTED OPUSCULA