A Zeiss Pulfrich photometer with a sphere reflectometer attachment, is used for measuring reflection from any surface at various wave lengths of light. The machine is used in the laboratory to test detergency by measuring the brightness of scoured...
This complicated piece of high vacuum apparatus in the laboratories of the Chemical Department of DuPont is used for measuring the surface are of fine powders, such as pigments. The process involves measuring the amount of gas such as nitrogen...
This complicated piece of high vacuum apparatus in the laboratories of the Chemical Department of DuPont is used for measuring the surface are of fine powders, such as pigments. The process involves measuring the amount of gas such as nitrogen...
Formed in one piece, this popcorn vending machine top of Lucite acrylic resin incorporates many improvements over the old type fixture. Measuring 34 inches wide, 27 inches deep and 14 inches high, the top is one of the largest one-piece, die-formed...
This Geiger-Muller counter is mounted on a stand of Lucite acrylic resin. Described as the most sensitive instruments known to man, such counters measure the degree of radiation from radioactive substances. They were used widely in determining...
By measuring the angle through which a beam of plane polarized light is rotated, the polarimeter makes possible of this instrument saves a great amount of time in analytical procedures. In this picture, a laboratory assistant records results of...
Highly ingenious laboratory tools and instruments help DuPont scientists uncover many secrets of nature ordinarily hidden from the human senses. This 'Breath meter' is so sensitive that mere blowing on the steel bar can easily be registered. This...
Costly lab gadgets explore and test in contingent effort to build better quality into products. Here, a technician uses a radar like cathode ray oscillograph, the wavy light steaks measuring precisely the split second brining time of a blasting cap.
The micro balance, shown here in the Chemical Department's Analytical Laboratory at DuPont's Experimental Station is one of the essential tools of modern chemistry, which demands a high degree of measuring accuracy. The human hair eight inches...
Testing and experimentation with synthetic textiles
The weight of fabrics, which is of importance to the manufacturer, wholesaler, retailers and consumer, is determined by precision balance. Sections of fabric measuring 4"" x 4"" are used to determine the weight per square yard.
A guide to primary material at the Hagley Museum and Library. For access to the contents of this collection contact Hagley at research@hagley.org or 302-654-2800.
A guide to primary material at the Hagley Museum and Library. For access to the contents of this collection contact Hagley at research@hagley.org or 302-654-2800.
