Firefly Books Microcosmos: Discovering The World Through Microscopic Images From 20 X to Over 22 Million X Magnification   Microcosmos is a remarkable photo-journey into everyday life through spectacular microscopic images. This new edition...

Walter Products Equilateral Glass Prism 3.2cm - 15cm Tall   High-quality prisms for experiments in diffraction, dispersion, and spectrum formation. Constructed of glass.3.2cm - 15cm Tall

Walter Products Equilateral Glass Prism 3.2cm - 10cm Tall   High-quality prism for experiments in diffraction, dispersion, and spectrum formation. Constructed of glass. 3.2cm - 10cm Tall

Walter Products Equilateral Glass Prism 3.2cm - 8cm Tall   High-quality prism for experiments in diffraction, dispersion, and spectrum formation. Constructed of glass.  3.2cm - 8cm Tall

Walter Products Equilateral Glass Prism 3.2cm - 5cm Tall   High-quality prism for experiments in diffraction, dispersion, and spectrum formation. Constructed of glass.  3.2cm - 5cm Tall

Walter Products Equilateral Glass Prism 3.2cm - 2cm Tall   High-quality prism for experiments in diffraction, dispersion, and spectrum formation. Constructed of glass.  3.2cm - 2cm Tall