The full name of this device is
the Minensuchstab (Sucheisen n.A.) 39 literally
"mine-searching rod (searching iron, new type)"--generally called
MS 39. It is made of two lengths of light metal tubing, one of which, the
"vibrating tube," has a hardened-steel point, while the other forms an extension
piece to be added when the rod is used from an upright position. The total
weight of the rod is approximately 1 pound, and that of the vibration tube and
point about 10 1/2 ounces. The vibrating tube is connected to the extension tube
by means of a bayonet joint. When packed for transport, the vibration tube and
point are inserted into the extension tube point first.
A German pamphlet describing the MS 39 gives the following instructions
for its use. The rod is to be held lightly between fingers and thumb, and
inserted vertically into the ground. Should resistance be encountered, the point
is to be lifted approximately four inches and dropped. A skilled operator can
tell the nature of the object in contact from its "feel," and from the sound
emitted by the vibrating tube. Thus it is stated that the point will "stick" in
wood, and the vibrating tube will emit a dull note which will be practically
inaudible if the wood is growing. The rod will rebound from metal objects and
give out a high note, while stones produce a high, almost shrill note, and cause
the rod to rebound sharply.