TERRESTRIAL MAGNETISM. 27 
Survey goes on, and must be considered as somewhat wide approxi- 
mations to the truth. The chart of Total Force should, however, be 
useful in deciding the size of the weight to be applied to the force 
needles in the Barrow and L. C. circles. 
(7) It is necessary to keep the area comprised within the radius 
of 30 feet from the Fox position, free from movable iron during 
magnetic observations. 
(8) No mechanical correctors should be used at the Fox position. 
If a large deviation should be observed at the Standard compass 
on the East or West points, it might be corrected by a fore and aft 
magnet. The exact date of its application and removal must be 
noted, the ship being swung on each occasion. 
The steering compasses should be fully corrected by soft iron and 
magnets as required. 
(9) The books of forms supplied for registering magnetic observa- 
tions are intended for retention in the ship. The spare forms for 
making copies of all observations to be sent to England as oppor- 
tunity offers. 
(10) Although Simon’s Bay, Melbourne, Lyttelton and the 
Antarctic land station have been alone mentioned, observations at 
any other port of call during the voyage are much wanted. Amongst 
others the Falkland Islands may be specially mentioned, being also 
within the zene of operations. 
(11) It seems to be a subject worthy of enquiry whether the dis- 
turbances of the needle from the normal are of the same character on 
ice as on land. 
PROGRAMME FOR INTERNATIONAL CO-OPERATION 
DURING THE ANTARCTIC EXPEDITION IN 
THE YEARS 1902 AND 1903. 
J. Tue work of the International co-operation at the time of the 
Antarctic explorations will consist of simultaneous observation of 
the magnetic and meteorological conditions of the Earth. 
A. OBSERVATIONS OF TERRESTRIAL MAGNETISM. 
2. The Object of these is to make available to science a series of 
separate pictures, which shall represent in detail the change taking 
place in the magnetic condition of the Earth as a whole in a definite 
