the Mercury Unit with the British Association Unit. 29 



Average obtained from Tube VI. = '95317 

 Correction =-00026 



Corrected result from Tube VI. ='95343 



Taking the mean of tubes IV. and V., the variations of the 

 other tubes are very nearly inversely proportional to the 

 squares of these ratios. 



Combining the results of tubes II., IV., V., VI., in this 

 way, the final result would be *95341. 



Combining the tubes with weights proportional to their 



resistances, that is proportional to -™, the final result would 

 be '95341. d 



Applying corrections, as given by Table V., we would have 

 •95346. 



We therefore give, as our value of the resistance of a 

 column of mercury one metre long, one square millimetre in 

 cross section, at 0° C, 



•95341. 



Table VI. — Eesults obtained by different Experimenters. 



Observers. 



Lord Bayleigh & Mrs. Sidg- 

 wick 



Mascart, NerviUe & Benoit 



Strecker 



L. Lorentz 



Eowland 



Kohlrausch 



Glazebrook & Fitzpatrick. . 

 Hutchinson & Wilkes 



Date. 



1883 



1884 

 1885 

 1885 



1887 



1887 



1888 

 1888 



Eeferences. 



Phil. Trans. 1883. 



Journal de Physique, 1884. 

 Wiedemann's Annalen, 

 toL xxv. 1885. 

 Same. 



f Communicated to British 

 \ Association 1887. 



(Abhandl. der K. Bayer. 

 Akad. der Wissensc'haf- 

 ten, II. Classe, vol. xvi. 

 Abth. III. 

 Phil. Trans. 1888. 



Yalue of 1 

 metre of 



Mercury in 

 B.A.U. 



•95412 



•95374 

 •95334 

 •95388 

 •95349 



•95331 



•95352 

 •95341 



