Intelligence and Miscellaneous Articles. 423 



III. Nickel : 4ttK = 30 ; I c = 165 ; 47rK e = 170. 



I'. I". 



4;rK. 



Calc. 



Obs.' 



Calc. 



Obs. 



50 



41 



42-5 



13 



10 



100 



35-2 



34-5 



50 



45 



150 



25-2 



25 



90 



90 



IV. Steel : 4ttK = 50 ; I c = 570 ; 4ttK c = 320. 



250 986 960 245 245 



V. Soft Iron : 4a-K Q = 300 ; I c = 520 ; 4ttK c = 3550. 



1000 



1240 



1200 



60 



50 



2000 



1060 



1030 



135 



140 



3000 



816 



816 



276 



290 



■ — Communicated bij the Author, from the Comptes Mendus, Jan. 15, 

 1894. 



Eeratum in last paper. P. 337, line 7 from bottom, p. 338, line 2 

 from top, for H m read I x I m . 



ON THE THERMAL BEHAVIOUR OF LIQUIDS. 

 To the Editors of the Philosophical Magazine. 

 Gentlemen, 



In the February number of the Philosophical Magazine, 

 Professors Ramsay and Young have published a short paper on 

 the thermal behaviour of liquids, in which the results of some of 

 my experiments are attacked. In the interest of true knowledge 

 I cannot leave these remarks unnoticed, as I consider they 

 rest on an insufficient foundation. 



The principal remark concerning the defectiveness of the arrange- 

 ments employed to obtain constant high temperatures does not 

 apply to me, as the authors of the above-named paper may easily 

 see. In my article (Wied. Ann. 1. p. 529, 1893) I expressly and 

 clearly state that in the glycerine bath which contained the 

 experimental tubes the temperature was perfectly uniform and 

 could be maintained constant for hours. This I proved by repeated 

 experiments. 



The conclusions arrived at by the authors and stated on p. 207 

 (Phil. Mag. vol. xxxvii. 1894) are in accord with my own observa- 

 tions, for I also found that when the experimental tubes were 

 uniformly heated in the glycerine bath no striae were visible, but 

 only a rusty appearance. As regards the purifying of the liquid 

 from air, the authors may see what particular pains were taken by 

 referring to p. 530 of my article, -q GJ-alitzixe. 



St. Petersburg : Physical Laboratory 



of the Academv of Sciences, 



February 21, 1894. 



