130 THE ROYAL SOCIETY OF CANADA 
-In Hudson Straits observations were again obtained in 1884-1885 
by the observers in connection with the International Polar expeditions, 
and again in 1896 by observers of the Coast and Geodetic Survey of 
the United States. 
Magnetic observations were first made in the Mackenzie River 
district by Franklin! in 1826 and again by Simpson? in 1830 and 1837. 
At Ft. Chipewyan and Fort Simpson Magnetic observations were main- 
tained for some months in 1843 and 1844 under the direction of Captain 
J. H. Lefroy of the Royal Artillery in connection with the Magnetic 
survey of the British possessions in North America, and at Fort Raee 
an International Polar research station was established in 1882 and 1883 
by Capt. H. P. Dawson.* of the Royal Artillery. Observations were 
again made at several points by G. M. Dawson in 1887, Ogilvie in 1887-8 
and more recently by Tyrell in 1900. 
In the settled parts of Canada records have been obtained much 
more frequently. Magnetic Observatories were established in North 
America in the year 1840 at Philadelphia, Washington and Cambridge 
in the United States, Toronto in Canada and Sitka in Russian America. 
In 1841 the British Government authorised a Magnetic Survey of the 
British Possessions in North America which was executed by Captain 
J. H. Lefroy and since his time observations have been made at very 
frequent intervals over a large area. 
Interest in Magnetic work has greatly increased in the last ten 
years, as evidenced by the activity in Magnetic surveys carried on by 
nearly all nations. In Canada in the last few years this work has been 
done by officers of the Department of Terrestrial Magnetism of the 
Carnegie Institute of Washington, by officers of the Dominion Obser- 
vatory, by surveyors of the Department of the Interior and of the 
Hydrographic Service, and also by the Meteorogical Service. 
The work done by the Meteorogical Service has been carried on in 
conjunction with the inspection of Meteorogical stations and the securing 
of Meteorological records. 
In 1907 observations were obtained at nine stations in the. Western 
Provinces. The cruise of the “Arctic”? in 1908-9 made possible the 
securing of observations at fifteen stations chiefly among the Parry 
Islands and on Baffin Land, whilst during the summer of 1910 thirteen 
stations along the Athabaska and Mackenzie Rivers were occupied. 
The instrumental outfit in 1907 consisted of Elliott Magnetometer 
No. 48, Dover Dip Circle No. 8 and Molyneux Chronometer No. 3332. 
Elliott Magnetometer No. 48 was used as the standard by the Agin- 
! United States C. and G. 8. Report 1902. 
* Magnetic observations at Lake Athabaska, J. H. Lefroy, London 1855. 
3 International Polar Expeditions Fort Rae, 1882-3, London 1886. 
