Search Results | Hagley Digital Archives

Title: Ludox particle size seen with an electron microscope
Date(s): 1955
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Description: This photograph demonstrates the exceedingly fine particle size of Ludox colloidal silica, a new product of the DuPont Company. This picture was taken with an electron microscope. The magnification is 25,000 diameters. This high magnification was necessary because the diameter of the average particle is about one two millionth of an inch. The fineness of the particles can be readily appreciated by the fact that the horizontal line at the bottom of the picture presents one twenty-five...
Show moreThis photograph demonstrates the exceedingly fine particle size of Ludox colloidal silica, a new product of the DuPont Company. This picture was taken with an electron microscope. The magnification is 25,000 diameters. This high magnification was necessary because the diameter of the average particle is about one two millionth of an inch. The fineness of the particles can be readily appreciated by the fact that the horizontal line at the bottom of the picture presents one twenty-five thousandth of an inch.
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Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_2656
Collection: DuPont Company product information collection

Title: Water repellency illustration
Date(s): 1955
Contributor(s): E.I. du Pont de Nemours & Company (originator), Rittase, William M., 1894-1968 (photographer)
Description: Here is how a fabric processed with a water repellent will react toward globules of water. Not only is the design attractive in itself but it clearly shows the practicability of a water repellent treatment. Material processed with DuPont Aridex or Zelan durable repellent will give protection against rain and other non fatty liquids, without affecting in any way the nature of the fabrics to which they have been applied.
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_2592
Collection: DuPont Company product information collection

Title: Fiber D rayon filament under 215x magnification
Date(s): 1955
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_1001
Collection: DuPont Company product information collection

Title: Magnified crystalline aggregates of silicon
Date(s): 1955
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Description: Crystalline aggregates of silicon look somewhat like short rough jack straws. The DuPont Company manufactures silicon as a pure element in this form. In this photo, as indicated by the short ruler, the 'spikes' appear about twice their actual size.
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_3347
Collection: DuPont Company product information collection

Title: Magnified crystalline aggregates of silicon
Date(s): 1955
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Description: Crystalline aggregates of silicon look somewhat like short rough jack straws. The DuPont Company manufactures silicon as a pure element in this form. In this photo, as indicated by the short ruler, the 'spikes' appear about twice their actual size.
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_3346
Collection: DuPont Company product information collection

Title: Micrograph of silicon
Date(s): 1955
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Description: A micrograph of the gray, sparklingly 'dense' silicon as manufactured by the Pigments Department of the DuPont Company Newport, Delaware. It is magnified four times.
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_3342
Collection: DuPont Company product information collection

Title: Microscopic view of neoprene latex
Date(s): 1955
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Description: Particles of neoprene latex, made by DuPont, look like this when magnified 25,000 times. Prior to examination under the electron microscope, the specimen was show-cast with gold to give the three dimension effect. Shadow-casting is a relatively new technique by which scientists study the size, shape and distribution of minute particles and learn how these characteristics affect the properties of the substance.
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_2520
Collection: DuPont Company product information collection

Title: Neoprene latex at 2500 magnification
Date(s): 1955
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Description: Neoprene latex looks like this at 2500 magnification. This photograph was made with the aid of an electron microscope, one of the research chemists' most valuable tools to discovery.
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_2521
Collection: DuPont Company product information collection

Title: Pigment molecules
Date(s): 1955
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Description: Pigment molecules-Rutile, with more closely packaged atoms, has more hiding power in paint.
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_2970
Collection: DuPont Company product information collection

Title: Enlarged crystals of silicon form a sparkling pattern
Date(s): 1955
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Description: Enlarged crystals of silicon form a sparkling pattern. These 'spikes', enlarged about three times, are made by the Pigments Department of the DuPont Company.
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_3344
Collection: DuPont Company product information collection

Title: Enlarged crystals of silicon form a sparkling pattern
Date(s): 1955
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Description: Enlarged crystals of silicon form a sparkling pattern. These 'spikes', enlarged about three times, are made by the Pigments Department of the DuPont Company.
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_3343
Collection: DuPont Company product information collection

Title: Cross section of nylon thread
Date(s): 1945
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Description: Photomicrograph, at 660 magnification, showing a typical nylon thread in cross section. The 17 filaments are almost perfectly round and very smooth. This represents a thread used in sheer stockings and fine knit goods.
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_1160
Collection: DuPont Company product information collection

Title: Orlon acrylic fiber
Date(s): 1955
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Description: Continuous filament yarn of Orlon acrylic fiber, greatly magnified, shows the striated surface of the fiber.
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_1403
Collection: DuPont Company product information collection

Title: An illustrated description of first-class achromatic microscopes, object glasses, microscopial instruments & apparatus, manufactured by Edmund Wheeler:
Date(s): 1869
Creator
Hagley ID: 08064690_Wheeler_achromatic_microscopes
Collection: Trade catalogs and pamphlets

Title: A description of Swift's new gold prize medal binocular microscope:
Date(s): 1870
Creator
Hagley ID: 08062860_swift_binocular_microscope
Collection: Trade catalogs and pamphlets

Title: Longitudinal section of Dacron polyester fiber magnified 1,000 times
Date(s): 1955
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Description: Longitudinal section of Dacron polyester fiber magnified 1,000 times
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_1462
Collection: DuPont Company product information collection

Title: Sulfamic acid crystals at 50x magnification
Date(s): 1945
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_0594
Collection: DuPont Company product information collection

Title: Sulfamic acid crystals under magnification
Date(s): 1945
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Description: Note on back reads: Mrs. Roberts, As near as I can figure these prints are approximately 24 times magnification of sulfuric acid crystals-Bill Sparks
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_0593
Collection: DuPont Company product information collection

Title: Sulfamic acid crystals under magnification
Date(s): 1945
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Description: Large crystals at approximately 1.5 times magnification.
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_0592
Collection: DuPont Company product information collection

Title: Sulfamic acid used for removal of scale deposits from dairy, sugar, paper, brewery and air conditioning equipment
Date(s): 1945
Contributor(s): E.I. du Pont de Nemours & Company (originator)
Collection ID: DuPont Company Product Information photographs (Accession 1972.341)
Hagley ID: 1972341_0595
Collection: DuPont Company product information collection