"PARKWAY PLASTICS, INC."

The Friction Rod Kit has all the materials needed to perform a variety of electrostatic experiments and demonstrations.

Black, Micaceous, glittery metallic.

White and black bands of quartz, feldspar, and biotite; typical foliation.

Red, medium, to coarse-grained iron oxide cement; shows hematite bands.

Gray andesite with phenocrysts of felspar and/or hornblende.

Dark brown to black; polycrystalline zinc ore.

Feldspar group; good cleavages of pure soda lime feldspar; most show twinning and labradorescence.

Amphibole group; dark greenish black cleavages, somewhat columnar.

Dark gray with abundant gas pocket vesicles.

Buff-colored, coarse, detrital limestone, with cemented shell fragments.

Fightly cemented, medium-to-coarse quartz grains.

Shiny crystal clusters and crystalline groups, this 'fools gold' is brassy and leaves a black streak.

Feldspar group; white-to-gray cleavages of sodic plagioclase; some show twinning.

Ideal for the colligate biological sciences student.

A Standard and Electric Calorimeter in one.

Hands-On Manipulation with Colorful Models.