104 



Lord Rayleigh and Dr. A. Schuster. 



[May 5, 



May 5, 1881. 



THE PRESIDENT (followed by THE TREASURER) in the 



Chair. 



The Presents received were laid on the table, and thanks ordered 

 for them. 



In pursuance of the Statutes, the names of Candidates recommended 

 for election into the Society were read from the Chair, as follows : — 



Ayrton, Prof. William Edward. 



Bates, Henry Walter. 



Bristowe, John Syer, M.D., 



F.R.C.P. 

 Christie, William Henry Mahoney, 



M.A., Sec. R.A.S. 

 Dickie, Prof. George, A.M., M.D., 



E.L.S. 



Kempe, Alfred Bray, B.A. 

 Macalister, Prof. Alexander, M.D., 

 Sec. R.I.A. 



McLeod, Prof. Herbert, F.I.C., 



F.C.S. 

 Phillips, John Arthur. 

 Preece, William Henry, C.E. 

 Samuelson, Bernhard, M.I. C.E. 

 Stoney, Bindon Blood, M.A., 



M.I.C.E. 

 Traquair, Ramsay H., M.D. 

 Watson, Rev. Henry William, 

 M.A. 



Wright, Charles R. Alder, D.Sc. 



The following Papers were read : — 



I. " On the Determination of the Ohm in Absolute Measure." 

 By Lord Rayleigh, F.R.S., and Arthur Schuster, Ph.D., 

 F.R.S. Received April 12, 1881. 



Part I. — By Lord Rayleigh. 



It is generally felt that considerable uncertainty still attaches to the 

 real value of the ohm, or British Association unit of resistance. The 

 ohm was constructed to represent 10 9 C.Gr.S. absolute units, but 

 according to Kohlrausch* it is nearly 2 per cent, too great, and 

 according to Rowlandf nearly 1 per cent, too small. On the other 

 hand, H. Weber J has obtained by more than one method results very 

 nearly in harmony with those of the British Association Committee. 

 Influenced partly by the fact that the original apparatus (though a 

 good deal out of repair) and the standard coils themselves were in 



* " Phil. Mag.," xlvii, p. 294, 1874 



+ " American Journal of Science and Arts," 1878. 



X '• Phil. Mag.," v, p. 30, 1878. 



