ART. 610. If any person be killed with a bowie knife or dagger, under circumstances which woud otherwise render the homicide a case of manslaughter, the killing shall nevertheless be deemed murder, and punished accordingly.

ART. 611. A “bowie knife” or “dagger,” as the terms are here and elsewhere used, means any knife intended to be worn upon the person which is capable of inflicting death, and not commonly known as a pocket knife.