ON STANDARDS FOR USE IN ELECTRICAL MEASUREMENTS. 155 



2. With this view we prepared draft resolutions embodying the pro- 

 posals which, subject to further consideration, appeared to us desirable, 

 and forwarded copies to the representatives of various interests for criti- 

 cism. Copies were also forwarded to the Press. We also invited the 

 following bodies to nominate witnesses to give evidence before us : 



The Association of Chambei's of Commerce of the United King- 

 dom. 

 The Association of Municipal Corporations. 

 The London County Council. 

 The Loudon Chamlaer of Commerce. 



3. In response to this invitation the following gentlemen attended and 

 gave evidence : 



On behalf of the Association of Chambers of Commerce, Mr. 



Thomas Parker and Mr. Hugh Erat Harrison. 

 On behalf of the London Council, Professor Silvanus Thompson. 

 On behalf of the London Chamber of Commerce, Mr. R. E. 



Orompton. 

 The Association of Municipal Corporations did not consider it 

 necessary to offer any oral evidence, but the following resolu- 

 tion passed by the Law Committee of that body, was adopted 

 by the Council of the Association : 



' The Committee are of opinion that, assuming that the 

 science of electricity has advanced so far that it is now 

 possible properly to define the three units referred to 

 in the Board of Trade letter,' (i.e., the ohm, ampere, 

 and volt) ' and to construct an instrument for the 

 purpose of standard measurement, the time has 

 arrived for the Board of Trade to take action thereon.' 



4. In addition to the witnesses above referred to the following gentle- 

 men were invited to give evidence, and we are indebted to them for 

 valuable information and assistance. 



Dr. J. A. Fleming. 



Dr. Alexander Muirhead. 



5. We also had the advantage of the experience and advice of Mr. 

 H. J. Chaney, Superintendent of Weights and Measures, who, at the 

 request of our Chairman, was present at our meetings. 



6. After a careful consideration of the questions submitted to ns, and 

 the evidence given by the various witnesses, we have agreed to the follow- 

 ing resolutions : 



Resolutions. 



1. That it is desirable that new denominations of standards for the 



measurement of electricity should be made and approved by 

 Her Majesty in Council as Board of Trade standards. 



2. That the magnitudes of these standards should be determined 



on the electro-magnetic system of measurement with reference 

 to the centimetre as unit of length, the gramme as unit of 

 mass, and the second as unit of time, and that by the terms 

 centimetre and gramme are meant the standards of those 

 denominations deposited with the Board of Trade, 



