(179) 
ERRATA. 
In the Proceedings of the Meeting of May 29, 1909. 
p. 88 line 7 from the top: “emission” and “absorption” are to be 
interchanged. 
Fig. 4 PI. I belonging to the Communication of Henri and Jean 
Becquerel and H. Kamerlingh Onnes: for 511.84 read 511.48. 
Fig. 8 PI II belonging to the same: for 391.26 read 491.26. 
(August 31, 1909). 
