What is "bologna vial"

Bologna \Bo*lo"gna\, n.

1. A city of Italy which has given its name to various objects.

2. A Bologna sausage; also informally called baloney.

   Bologna sausage [It. salsiccia di Bologna], a large sausage made of bacon or ham, beef, veal, and pork, cooked and smoked, chopped fine and inclosed in a skin.

   Bologna stone (Min.), radiated barite, or barium sulphate, found in roundish masses composed of radiating fibers, first discovered near Bologna. It is phosphorescent when calcined.

   Bologna vial, a vial of unannealed glass which will fly into pieces when its surface is scratched by a hard body, as by dropping into it a fragment of flint; whereas a bullet may be dropped into it without injury.