ORE HANDLING 
2. 
possible to remove the compasses during use of the magnet, 
but such a procedure would be troublesome and unpopular, 
There remains, therefore, scope for the contrivance of some 
device which will do away with the harmful magnetic effect 
on delicate navigating apparatus in the neighbourhood. 
The foregoing remarks do not apply to the Gyro Com- 
pass, the action of which is independent cf magnetism and 
is governed solely kor tha earths rots +ign