Volume 20, Issue 1 (January 1975)
Shadowgraphs of Bulbs, Bottles, and Panes
The technique of physical comparison of fragments of glass by the characteristics of their edges or cross sections is well established. As successful as this technique can be, one is still occasionally faced with fragments, the edges of which cannot be fitted. Even though these fragments may have the same physical characteristics, identifications and exclusions are both impossible.