1
The variation of the magnetic needle observed on shore by Lieutenant Roe:
2
In England, Wheatstone and Cooke had introduced a ponderous magnetic needle telegraph.
3
Finally, the Dayrah Jahi is when the magnetic needle points due north.
4
Over this dial is a magnetic needle or pointer, 6 in.
5
Why, we enquire, does the magnetic needle set north and south?
6
The only instrument we used was the special magnetic needle.
7
It consists of a delicate silk-fiber-suspended magnetic needle, 5 cm.
8
A compound magnetic needle was used to detect the currents.
9
Placing a small magnetic needle near a bar magnet, it takes a determinate position.
10
Such a substance cannot be absolutely neutral as regards the deportment of the magnetic needle.
11
Brugmans had shown that bismuth repelled a magnetic needle.
12
Was it, then, Negoro's interest for the magnetic needle to return to its true direction?
13
Historical evidence of the use of the magnetic needle in navigation dates from the twelfth century.
14
Under these conditions it is obvious that the magnetic needle is quite useless for steering purposes.
15
The magnetic needle began to vary its direction.
16
They will hardly believe an unseen force flows through the magnetic needle, turning it to the north.
