Annotated Photomicrographs taken—but not printed—in Matrix texts. Those having elliptical FPIs include no S&W. Mix of calibers, showing class characteristics and peculiar traits.

Useable as flash-cards. (Remember those?)  ;)

(http://i70.photobucket.com/albums/i117/chipmunkwhisperer/P8010005_zpss8gnghui.jpg)