1990 Photomicrography Competition

Double exposure of rat hypothalamus showing locus of the mammalian biological clock

Dr. Wutian Wu

Affiliation
Eastern Virginia Medical School
Department of Anatomy and Neurobiology
Norfolk, Virginia, USA
Technique
Brightfield and Darkfield
Magnification
10x

Thin slab of Brazilian agate

John I. Koivula

Affiliation
Gemological Institute of America
Carlsbad, California, USA
Technique
Brightfield
Magnification
12x

Crystal growth patterns from an anionic surfactant

Ron Sturm

Affiliation
Construction Technology Laboratories, Inc.
Skokie, Illinois, USA
Technique
Polarized Light
Magnification
10x