ON STANDARDS FOR USE IN ELECTRICAL MEASUREMENTS, 33 
The work of testing resistance-coils has been continued, and a table 
of the values found for the various coils examined is given. 
British Association Units. 
No. of Coil Resistance in B.A. Units Temperature 
Elliott, No. 122 J 10:0163 19°°8 
10-0017 15°°2 
G, No. 61 U 9-9885 105 
Elliott, No. 58 99834 14°05 
Legal Ohms. 
No. of Coil Tesaniee in fag Ohms Temperature 
iy No. 150 99895 11°7 
¢, No. 151 ‘99974 13°-9 
Elliott, 149, ¢, No. 152 -99912 12°-5 
Elliott, 136, ¢, No. 153 ‘99977 12°-4 
¢, No. 154 1:00032 17°3 
The Committee hope that arrangements may be made for issuing 
standards of electro-motive force and constructing standards of capacity. 
In conclusion, they would ask to be reappointed, with the addition of the 
names of Professor J. J. Thomson and Mr. W. N. Shaw, with the re- 
newal of the unexpended grant of 50/. 
Report of the Committee, consisting of Professors A. JOHNSON 
(Secretary), J. G. MacGrecor, J. B. CHERRimAN, H. T. Bovey, 
and Mr. C. CarPMAEL, appointed for the purpose of promoting 
Tidal Observations in Canada. 
Tur Committee have represented to the Canadian Government the 
importance of publishing tide-tables for Canadian waters, and the neces- 
sity for this purpose of establishing stations for continuous tidal observa- 
tions, recommending that the observations be subsequently reduced by 
the methods of the British Association. 
They have pointed to the example of the United States Government, 
which has provided tide-tables for both the Atlantic and Pacific coasts. 
In urging the practical side of the question they have more especially 
referred to the tide-tables for British and Irish ports published by the 
Admiralty, which give the rate and set of the tidal currents in the waters 
Surrounding the British islands; and they have drawn attention to the 
heavy annual losses caused by ignorance of these currents in Canadian 
waters, as shown by the wreck list. 
1885. D 
