1. 1878. Phil. Trans. Part i 155–155.
2. Absorption of gases in a high vacuum
3. According to
Rollins W. Elec. Rev. 1900 April 358 358 11thit appears that it has been thought that the gas escapes through the wals of the tube, a not altogether impossible idea at first sight when we remember that the carriers in Lenard rays can be shot through thin layers of aluminium.