|
Magnetism |
|
51408 Magnetic Compass
In Aluminium or Plastic case. Printed colourful dial with
aluminium/ Brass case.
A B C D
Size mm 12.5 25 50 75 |
|
|
51409 Mariner's Compass
Aluminium bowl gimbals, in polished wooden box with sliding
cover. Compass diameter 10 cm. |
|
|
51410 Mariner's Compass
Same as No. 51409 but on Aluminium stand.
|
|
|
|
51411 Compass Box
Consists of bakelite case, with metal dial graduated in degrees
and anti-parallax mirror. Cobalt steel magnet and aluminium
pointer are mounted on special synthetic sphire. The needle
moves on special hardened steel pivot. |
|
|
|
51412 Dip Needle
With graduated arc, steel needle 10 cm long, capable of rotation
on aluminium base, divided at 450. |
|
|
|
51412A Dip Needle
Steel needle 10 cm long, with jewelled bearing and circular
metal scale about 12.5 cm. diameter and anti-parallax mirror,
both rotatable about vertical axis. Mounted on Aluminium base of
diameter 15 cm marked in 4 quadrants; with extra needle
unmagnetised. |
|
|
|
51413 Dip Circle
Cobalt Steel magnetic needle strongly magnatised, fitted with
hardened steel pivot working in agate cup bearings. The needle
can be readily removed for reversal. The vertical scale is
graduated in degrees, divided up in four equal quadrants, each
rainging from 0 to 90*. The case is made of Aluminium with glass
on both sides and hinged door and a sensitive circular spirit
level. It rotated on a metallic tripod into 360* and is read by
vernier to 0.1 degree. |
|
|
|
51414 Deflection
Magnetometer
It consists of a compass box No. 51411 fitted on a polished wood
base. With hard wood millimeter scale, removable compass box.
Without magnets. |
|
|
