395 
1911—12.] Experiments in Radioactivity. 
Note. — Since the above paper was contributed the author has noticed 
that Dr Plesch is reported in the Lancet of 25th May 1912 to have treated 
two cases of suppuration of the accessory cavities of the nose by inhalation 
of the thorium emanation. The treatment was followed by a disappearance 
of the headache and a diminution in the secretion. 
No previously recorded case of the therapeutic application of a sjpray 
of the thorium emanation is known to the author. 
{Issued separately September 9, 1912.) 
