592 REPORT — 1 894. 



The use of these equivalents makes it easy for persons who are accustomed to 

 the British yard, foot, and inch to think also in metric measures. They also 

 furnish a liiik between British and metric measures which yields a ready means 

 of effecting- a closely approximate conversion of either into the other. For 

 example, if we want to convert 27 yards into metres we write — 



27 yards = (1 - ,3jy) x 27 metranes 

 _ / 27 

 -\- 2-7 

 = 24:*o metranes. 



The correction of 1 in every 62'5 (which is the same as -1 in every 6^, or as 

 •02 in every 1^) requires the addition of rather less than 



+ •4 

 which gives 24-7 metres 



as the approximate equivalent. The accurate value differs from this by less 

 than half an inch, and, moreover, by continuing the process two steps further the 

 accurate value may always be got out. The calculation is of a kind which, when 

 one is accustomed" to it, can be made in the head rapidly and with ease. 



Department III. 

 1. Report of the Electrical Standards Committee. — See Reports, p. 117. 



2. Determination of the International Ohm in Absolute Measure. 

 By Professor Viriamu Jones, F.R.S. — See Reports, p. 123. 



3. Comparison with the B.A. Units of some Coils of Low Resistance. 

 By R. T. Glazebrook, F.R.S.—See Reports, p. 128. 



4. Comj)arison of the Standards of the Board of Trade with the B.A. Unit. 

 By J. Rennie. — See Reports, p. 130. 



5. Comparison of some Standards belonging to the Indian Government. 

 By E. O. Walker. — See Reports, p. 131. 



6. On the Specific Resistances of Copper and Silver. 

 By Rev. T. C. Fitzpatrick. — See Reports, p. 131. 



7, On Standards of Low Electrical Resistance. 

 By Professor Viriamu Jones, F.R.S. 



8. On the Specific Conductivity of Copper. By J. Teichmuller. 



