APPENDIX C LIX 
order to determine the constants of their instruments. Also to Messrs. 
French and Menzies, of the Dominion Observatory, each of whom 
spent several days in standardizing and determining the various con- 
stants of their magnetometers and dip instruments, both before and 
after their field work. 
Instructions were given to Mr. Savary, of the Hydrographic 
Survey, and to Mr. Lavoie, who accompanied Capt. Bernier, on the 
manner of making magnetic observations and reducing them. 
An officer of the Meteorological Service, Mr. W. E. Jackson, M.A., 
to whom was assigned the duty of inspecting the Meteorological Stations 
in the Mackenzie valley, during the summer of 1910, was provided with 
a magnetometer, with instructions to determine the Magnetic values 
at various points when the opportunity offered. He took observations 
at Athabasca Landing, Grand Rapids, Ft. McMurray, Ft. Chipewyan, 
Ft. Smith, Slave River, Ft. Resolution, Hay River, Ft. Simpson, Ft. 
Providence. Ft. Wrigby, Ft. Good Hope and Ft. MacPherson, and the 
results obtained are given in Mr. Jackson’s paper on “Magnetic Ob- 
servations in Canada,” which appears in this Number of the Transac- 
tions. A determination of the constants of all the instruments at the 
observatory is now in progress. 
SEISMOLOGICAL OBSERVATIONS. 
The Milne Seismographs at Toronto and Victoria have been kept 
in operation throughout the year, 93 disturbances being recorded by 
the former and 90 by the latter. The only really large disturbance 
was from an Alaskan quake on November 6th, 1910, when the Victoria 
instrument recorded a swing of 17 m.m. and the Toronto instrument 
4m.m. Moderate disturbances of unknown origin were recorded on 
May 13th and 31st and June 16th, while the Turkestan quake of 
January 3rd, and the Italian quake of February 18th were clearly 
registered. To the present time seismology has not been organized 
as a subject for special research in connection with the Meteorological 
Service, and yet Mr. F. N. Denison, of Victoria, B.C., has for some 
years been carrying on investigations which now promise to yield 
valuable results. Twice each year tables giving details of all dis- 
turbances, are forwarded to the Secretary of the Seismological Com- 
mittee of the British Association and to various other Seismological 
Bureaus in Europe and the United States. 
TIME SIGNALS. 
No important changes have been made in that portion of the 
. Dominion time service which is under the control of the Meteorological 
Service. Signals continue to be automatically repeated from the land 
