Small, round pellets of Polypropylene. Pellets are white and semi-translucent.

Polypropylene, also known as polypropene, is a nonpolar, thermoplastic polymer and polyolefin. Though its physical properties are similar…

Black and white reproduction of a portrait of Nathaniel C. Wyeth (1911-1990) used for a newspaper publication's announcement of his death. The original portrait of Wyeth was taken in 1986, and this print ran in 1990.
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Two booklets containing nylon samples dyed in various shades. Samples represent the hosiery variety available for purchase at the Harrison Hosiery Company located in Philadelphia. The booklets contain samples for…

Teddy Ruxpin is an animatronic children's toy in the form of a talking 'Illiop', a creature that looks like a bear. The bear's mouth and eyes move while "reading" stories played on an audiotape cassette deck built into…

Electric-powered meter with instructions housed in wooden box. Movable components within box: two (2) slide glass filters (1 with red, green, and blue slides; 1 with orange, green, and blue slides); one (1) encasing to…

While its mineral name is halite, this substance is also commonly known as rock salt. Rock salt is composed of sodium chloride, an essential compound the human body uses to absorb nutrients and maintain blood pressure.

Olivine is a mineral with a distinct green color and granular-shaped crystals. It is one of the first minerals to cool and crystallize from magma. Recently, olivine has been used as an alternative to silica sand and…

Calcite is one of the most widely used minerals. It is primarily composed of the chemical compound calcium carbonate. Calcite is also often used in demonstrations of double refraction, in which light is split into two…

Fluorite (also called fluorspar) is the crystal form of the inorganic compound calcium fluoride. The term "fluorescence," a type of luminescence by a substance that has absorbed light or radiation, is derived from this…

Barium (atomic symbol Ba) is an alkaline Earth metal. Barite (also spelled baryte) is a mineral composed of barium sulfate. It is used in paints, inks, paper, and rubber. It is also used in radiology for diagnostic…

Boron (atomic symbol B), a naturally occuring Earth element, was first isolated by Sir Humphry Davy and Joseph Louis Gay-Lussac and Louis Jacques Thénard in 1808. Tourmaline is a boron silicate. Opaque and black in…

Amazonite is a potassium-based blue-green variety of microcline feldspar. Its color may be an indication of the presence of iron or lead. Amazonite has been used as a decorative gemstone in statues and jewelry.

Celestine is a mineral with a light blue color. It is a source of the element strontium (atomic symbol Sr). Strontium compounds are commonly used in fireworks, fluorescent lights, and dyes and paints.

Self contained pH meter with wooden exterior; hinged lid opens to reveal meter face and inlaid paper instructions for use; the dial is calibrated from pH 0 to pH 13 in .1 pH divisions; porcelain enamel lined electrode…

Small brass microscope likely dating from the last quarter of the 19th century; no maker's name or other identifying marks; rests on a circular stand; body of scope connected to base stand by a hinge that allows the…

Hand mirror, hairbrush, comb, nail buffer and holder, button hook, and trinket box of Ivory Pyralin, a brand name for DuPont celluloid.

In the United States during the 1860s, John Wesley Hyatt experimented with…

Spectroscope is in the style of the original Bunsen-Kirchhoff design. Triangular glass prism sits on a round, brass dias and is held in place by a metal arm attached to the dias; prism is coated in black paint with only…

A: Refractometer
Instrument has round cast iron base; on the base is a rectangular glass mirror mounted to allow rotation; a single black pillar supports the prism alidade, the black cylindrical telescope viewer, and…

A: Microscope
Ernst Leitz oil-immersion microscope; instrument rests on wishbone-shaped base with a single beam extending from the center before splitting into two sections: an arm supporting the telescope and…

A: Cast iron base attached to a sloping cast iron upright supporting the reader, prisms, sample cups, plungers, and a mechanism for raising and lowering the sample cups; two metal knobs control the height of the sample…

A: Refractometer
Instrument has round base with black finish; on the base is a double-sided circular glass mirror mounted to allow full rotation; a black pillar supports the prism alidade, the black brass cylindrical…

The Coolibar hooded one-piece swimsuit for a small child is constructed with four-way stretch knit (polyester and spandex). The hood protects the infant's neck and head while the zipper and snap buttons eases putting on…

Models kits, such as this one, are often found in laboratories and classrooms and are used to visualize the structure of chemical substances.