On the inhalation of the vapour of ether in surgical operations.

Includes an account of Snow’s regulating inhaler, the first to control the amount of ether vapor by the patient. This pamphlet, which appeared in October 1847, was the second treatise on ether anesthesia, after Robinson who pubiished in March, 1847.
Snow first published a description and illustration of the regulating inhaler in Lond. med. Gaz., 1847, n.s. 4, 745-52, 923-29.