[The clinical biomechanical interpretation of gunshot wounds. The general problems (IV). The propedeutic ABCs of the terminal ballistics]. / Lettura biomeccanico-clinica della ferita d'arma da fuoco. Problematica generale (Parte IV). Abbecedario di propedeutica alla balistica terminale.

If we want to enunciate the damaging potential of a bullet fired from a gun we have to express ourselves right from the outset in terms of destructive work, that is to say not only destruction of the structures the bullet passes through, but also, above all, destruction of the homeostatic condition. In modern terms, this is particularly true of the abdomen, which, in perspective, above and beyond any direct involvement, is a candidate for an interesting role. As regards the translation of this destructive force in mathematical language, formulae are proposed in kilogram-meters, feet per second and Joules. A basic factor in external ballistics, quite apart from the actual forces involved, is the trajectory in space, the hyperbola, though we should also reflect on the problem of resistance, which has such a considerable effect on the behaviour of the "ideal" bullet in the atmosphere (the smallest calibre for a given mass, with the attempt to rid itself of its forced subordination to the calibre of the barrel). This leads us on to the subsequent concept of the "ballistic coefficient" and, in itself definitively established the basic assumptions of terminal ballistics.

[Non-specific solitary ulcer of the transverse colon (presentation of a case and review of the literature)]. / Ulcera solitaria non specifica del colon trasverso (presentazione di un caso e revisione della letteratura).

In the light of findings emerging from a critical review of the literature, the Authors present a case of solitary non-specific ulcer of the transverse colon successfully treated by surgery. The various pathogenetic theories are examined, and the diagnostic work-up to which the patient must be subjected is discussed. The study concludes with a description of the choice of therapy.