( 239 ) 



F may remark about this thai I have meant nothing else which 

 it seems. I ought to have set forth mure clearly — bnl toconclude 

 to the existence of the minimum temperature, when the plaitpoinl 

 temperature at the extremity of the branch of the plaitpoint line 

 where the condition in question is fulfilled, is lower than at the 

 other end of that branch, in which ease this one condition is really 

 sufficient. 1 ) 



ERRATA. 



In the Proceedings of the meeting of February 1907 



p. 660 1. 5 from the bottom: for "least" read: 'most' 

 p. 662 table II in the heading read MjM, = 2 



In t lie Proceedings of the meeting of March 1907; 



p. 765 I. 13 from the top: read; 



i' (j>t'.i)i" — (} iv a)i' 

 t' — t' 



1"a 



table VII, for: a p 



dt 



p. 778 1. 13 and 14 from the top: for «,, read: «,. 

 p. 785 1. 17 from the bottom: Insert: 



For the temperatures in liquid hydrogen first the correction is to 

 be applied which will prove to be necessary according to Comm. 

 N°. 95' § 36 and § 8. 



p. 796 the value for 



1— a>M 



given in equation (1) is to be multiplied 



by Va ni ,la nM . 



l ) But I readily concede that Prol'. Kamerlingh Onnes and Dr. Keesom have been 

 the first to deduce both conditions for the minimum and to take in consideration 

 the cases a and c. i.Note added in the English translation). 



(October 31, 1907). 



