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  1. Amber-tinted lucite bracelet; exterior has raised floral pattern.

    Lucite methyl methacrylate polymer was among the first plastics derived from petrochemicals. DuPont chemists discovered Lucite in 1931 while exploring…

  2. Pair of protective eyewear worn while welding and cutting. Bakelite frames are reddish-brown in color and attached to adjustable black elastic headband. Lenses are reflective and appear dark green in color when not in…

  3. Set of 16 possibly Bakelite billiard balls; some billiard numbers are missing or duplicated.

    Green cardboard box with removable top; red product information sticker on one side of box top; remnants of cardboard…

  4. Black Bakelite cylindrical base with four steel arms giving it support; red Bakelite circles are attached to the end of each arm; the model itself is attached with a steel arm that protrudes upward from the base; model…

  5. Black Bakelite cylindrical base with four steel arms giving it support; red Bakelite circles are attached to the end of each arm; the model itself is attached with a steel arm that protrudes upward from the base; model…

  6. Black Bakelite cylindrical base with four steel arms giving it support; red Bakelite circles are attached to the end of each arm; the model itself is attached with a steel arm that protrudes upward from the base; model…

  7. Black Bakelite handle with a large button on its side; product information engraved in white on front of handle; circular grated area has a raised enclosure; four copper wires coated in brown synthetic fiber emanate…

  8. A cardboard cone wound with thin white rubberized thread.

  9. Wooden box with handle at top and metal latch closure at front; interior: instructions for use printed on paper and inset into box lid; top face: window at center reveals pH scale "7-14" and millivolts "0-400"; control…

  10. A - Old Gold
    B - Gold
    C - Plum
    D - Silver Gray
    E - Maroon
    F - Old Rose
    G - American Beauty
    H - Silver Gray
    I - Black
    J - Bright Green
    K - Old Rose
    L - Golden Brown
    M - Olive Green
    N - Mahogany
    O - Olive Green
    P - Olive…

  11. Wooden apparatus for holding ten test tubes upright.

  12. Wooden apparatus for holding six test tubes upright.

  13. Wooden apparatus for holding twelve test tubes upright.

  14. Wooden apparatus for holding five test tubes upright.

  15. Rectangular wooden apparatus for holding fifteen test tubes upright. Heavy tape has been attached to all four sides.

  16. Blue cardboard box containing three compartments; two compartments hold a number of black and white stone marbles; third compartment holds four brass rods, numerous glass spacers, and sheets of thin paper; box also…

  17. Rectangular grey cardboard box with white writing and colored disks on sides; box contains a cardboard separator that divides the inside into four compartments and an instruction booklet; the compartments contain a…

  18. Variable resistors are also known as potentiometers. Potentiometers are used to measure electromotive force (emf) by balancing it with a known emf. The concept was first developed in 1841 by J. C. Poggendorff and…

  19. Tall rectangular wooden base with black plastic instrument panel; instrument panel is attached to base via four metal screws, two on each side; two small black plastic knobs that adjust up and down as they are turned…

  20. Potentiometers are used to measure electromotive force (emf) by balancing it with a known emf. The concept was first developed in 1841 by J. C. Poggendorff and improved throughout the 19th century by Latimer Clark and…

  21. Wooden box with black metal instrument panel; four padded metal feet on bottom; leather handle attached to side with two nickel connectors; nickel lock on side of base and lid; lid connects to base via two coated metal…