LXXVIII THE ROYAL SOCIETY OF CANADA 
were observed. The most of the stations were in British Columbia, 
including a series along the Grand Trunk Pacific railway from Prince 
Rupert eastward. There is a growing public demand for the results 
of this survey, especially in regard to the declination or variation of 
the compass, as popularly called. 
The gravity survey completed a good season’s work by occupying 
24 stations across the continent, besides Ottawa the base station, 
which in turn is linked up by inter-comparison with Washington, 
thereby making the Canadian observation of international standard. 
The observations have all been made with the Mendenhall half- 
seconds pendulum, whereby an accuracy within the one-tenmillionth 
of a second of time for the period of the pendulum is attained. 
SURVEYS 
The first draft of the report on the survey of the 141st meridian 
between Yukon territory and Alaska, has been approved by the 
Commissioners, and thirty-two of the thirty-eight map sheets have 
been printed and the proofs of the remaining six have been examined. 
The maps of the boundary between British Columbia and south- 
eastern Alaska are being made ready for the printers. 
On the Ontario-Minnesota boundary, the survey is completed 
from the Northwest Angle, Lake of the Woods, to the outletof Namakan 
river from Lake Lacroix. It will require a short season’s work to 
make connection at Curtain Falls with the survey from Lake Superior. 
This will complete the Canadian sections of this boundary. 
The Quebec-Maine boundary along the highlands was com- 
pleted from the head of the south west branch of the St. John river, 
to where the line passes between Portage Lake in Quebec and Penonob- 
scot lake in Maine. 
A triangulation was also carried from Lake Pohenagamook at 
the head of the St. Francis river, to a point on the St. John river, 
about ten miles from the north and south line, between New Bruns- 
wick and Maine, a distance of 96 miles. 
On the Geodetic Survey of Canada a reconnaissance was made 
from the vicinity of Hecate strait to Queen Charlotte sound, including 
Queen Charlotte islands and the islands adjacent to the mainland. 
Angle measures were made at five primary stations with a 12-inch 
theodolite. Oldfield station in the vicinity of Prince Rupert was 
prepared as a Laplace Station. 
The triangulation west from Lake Superior is completed to 
Sagahinage lake, and the reconnaissance extended to the middle 
