Fig. 5.
13. To what kind of artillery has this fuze been confined?
Principally to light artillery, in firing shells and particularly spherical case, where regularity and certainty are essential requisites.
114]
14. Mention one important advantage of this fuze.
The shells can be loaded, all ready for use, and remain so any length of time, perfectly safe from explosion, as the fuze can be screwed into its place, and the composition never exposed to external fire until the metal is cut through.
15. What is the only operation under fire required?
To gouge through the metal at the proper point, with any kind of chisel, knife, or other instrument.
16. Describe the United States sea-coast fuze.
In the United States, a bronze fuze-plug has been adopted for heavy shells instead of the wooden one. It fits the eye in the same way, and is retained by friction.