1692 
ERRATA. 
In the Proceedings of the Meeting of Sept. 25, 1915, Vol. XVIII, 
p. 506 line 15 from the bottom: for 1194§5 read 419 $ 55 
ks 
5 OOOH D STe 0.001028 
De 3 ee a ss oO 11.2 
ze 55 ie ag Ak or 0:04 a 40e 0.05 
a Ee bs : ,, smallerthan,, of the order 
of magnitude of 
