Round glass bottle with cork stopper; label attached to front identifies manufacturer and contents (label has been waxed over); bottle is half full with original dye.

Piece is bound in stained veneer and consists of 20 veneer samples interleaved with printed parchment.

Round glass bottle with cork stopper; label attached to front identifies manufacturer and contents (label has been waxed over).

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…

Eighteen soap samples, each colored with a different dye combination manufactured by the National Aniline and Chemical Company. Includes a description of the soap's composition and the method of dying.

Contains a listing of available benzo color dyes.

This liquid chromatography recording detector system consists of a dual-beam spectrophotometer, a pH meter, and a conductivity cell.

This is a double-beam instrument that measures fluorescence through spectroscopy.

This is a double-beam instrument that measures fluorescence through spectroscopy.

Colorimeters are used to quantify the concentration of a solute in a solution by measuring the absorbance of a particular wavelength or color of light by the solution.

Colorimeters are used to quantify the concentration of a solute in a solution by measuring the absorbance of a particular wavelength or color of light by the solution.

This piece is the cover to Bulletin 7389 for the Model 160 wavelength selectable detector used in liquid chromatography.

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: Duboscq type colorimeter, biological, with electric illuminator. Hollow black cast iron base attached to a sloping cast iron upright supporting the reader, prisms, and sample cups; reader detaches with two metal…

Cast iron base attached to a sloping cast iron upright supporting the reader, prisms, sample cups, and a mechanism for raising and lowering the sample cups on a focusing rail; metal knobs on each side control the height…

Sample book with dyeing instructions and an 18-section foldout containing 143 dyed feathers.

A red display box of 24 samples of various products colored with dyes. The top and side flaps open to reveal 24 samples of various products colored with dyes. Includes liquids in small bottles, powders in brass circular…

Round glass bottle with glass stopper; label attached to front identifies manufacturer and contents (label has been waxed over).

Round glass bottle with cork stopper; label attached to front identifies manufacturer and contents (label has been waxed over).