1978 Photomicrography Competition

Crack propagation specimen

Paul Chapello

Location
Argonne, Illinois, USA
Technique
Nomarski Differential Interference Contrast
Magnification
156x

Sodium chloride crystal in salt solution

John J. Kroll

Location
Livonia, Michigan, USA
Technique
Rheinberg Illumination
Magnification
100x

Hexanitrodiphenylamine high-explosive crystals

Stephen Skirius

Location
Chicago, Illinois, USA
Technique
Crossed Polarized Light
Magnification
35x