| Description | Expresses the special thanks of the members of the Royal Institution for Mackenzie Davidson's discourse on Friday 2nd of February, on 'Nital effects of radium and other rays'.
Attached to this letter is: a notice of another lecture of Mackenzie Davidson's lectures at the Royal Institution, delivered on the 25th of April 1902, on 'x-rays and localization', and a list of experiments on the subject. |