The scans of text that follow were made from:
Boyle R (1661). Two Essays concerning the Unsuccessfulness of Experiments, Containing divers Admonitions and Observations (chiefly Chymical) touching that Subject.
Reissued in The Works of the Honourable Robert Boyle in Five Volumes, London: A Miller, 1744, pp 204-227.
The editors are grateful to:
Special Collections at the Sheridan Libraries, Johns Hopkins University, for permission to display these scans from 1661.