154 REPORT— 1892. 



necting tbe galvanometer, and then momentarily making tbe battery 

 -circuit for a very small traction of a second. The observations on the 

 condenser "2 show that there has been no appreciable change in the 

 relative value of Standards I. and II. The observations throughout are 

 accurate to about one part in 10,000. 



During the process of the work Mr. Bowley compared several of the 

 resistance boxes of the Association together. As these are used as 

 standards in many experiments it will be useful to put the results on 

 record. 



Box Elliott 1253 is a Wheatstone's bridge box of platinum silver in 

 legal ohms, said to be right at 17° C. Assuming that the two 1,000-ohm 

 coils of the bridge are equal, and the experiments showed no appreciable 

 difference, the following values were found for certain coils in terms of a 

 nominal 10,000 ohms taken from 1253. 



The temperature of all the coils was about 15°'6 C. 



Thus the box Elliott 1825 is right at about 4° below the box 1253, 

 -while the box Nalder 1870 is right at about l°-5 below 1253. 



Table XV. 



APPENDIX VIII. 



■On the Values of certain Standards of Resistance and Electromotive Force 

 sent from Berlin for Comparison with the British Association Standards. 

 By R. T. Glazebeook, F.B.S. 



Towards the end of July Dr. Lindeck, of the Physikalische Blectro- 

 technische Reichsanstalt at Berlin, brought to Cambridge three resist- 

 ance coils of nickel-manganese-copper alloy in order to compare them 

 with the British Association standards. Experiments to determine the 

 value of these coils in terms of the resistance of mercury are in progress 



