Among the purposes for which the Germans are using captured ammunition
is the improvisation of wooden box mines, each containing four 75-mm French
shells (for previous reference in Tactical and Technical Trends to
this subject see No. 43, p. 7).
The box mines are 7 1/2 inches square and 12 inches high. Nose caps in
the shells are removed and two of the four shells are plugged while each of the
other two has a pressure igniter in place of the usual fuze. The lid of the box is
loose and rests on the firing mechanisms, which presumably are pressure operated. No
further details are available.