Huygens' pendulum experiments : successful and unsuccessful.
- 10 unnumbered pages : illustrations ; 25 cm.
- Communication from the Museum for the History of Science, Leyden ; no. 100 .
- Mededeling van het Rijksmuseum voor de Geschiedenis der Natuurwetenschappen te Leiden ; nr. 100. .
"Reprinted from the Catalogue of Tercentenary Exhibition of the Pendulum Clock of Christiaan Huygens, Publication Number 2 of the Antiquarian Horological Society." Lecture given to a joint meeting of the Antiquarian Horological Society and the British Horological Institute on Dec. 5, 1956.