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...
Ludox colloidal silica, a product of DuPont research, is rapidly being adopted by the carpet industry as a soil retardant. It is easily applied at the mill by a multiple spray method, as shown here. Tiny, smooth particles of the Ludox fill up the...
This complicated physical apparatus at the Experimental Station of DuPont determines the total surface area of particles of finely divided materials. These determinations are important in developing pigment for finishes and other products base on...
Table of Contents: Neptune's second skin; Tracking the atom's tiniest particles; Hot fuel in cold storage; In support of shapely silhouettes; Footwear for small fry; Bakcar eyes: an anniversary achievement; A new line on gas distribution; What's...
Close up of south face of Brookhaven Reactor-Through these holes in the south face of the Brookhaven reactor are introduced tons of pure uranium metal. Once in the graphite moderator of the reactor proper, uranium atoms fission, or spilt, in a...
After wood pulp for cellophane is steeped in caustic solution, it is reduced to fine particles in a shredder. Here, operator empties the shredded pulp into bin. Other chemicals will be added to make a viscous liquid which is cast into the clear...
Chemicals are added to the woodpulp for cellophane in barattes and the material is mixed further here. Shredder has already reduced woodpulp to fine particles for this process.
These paper barrel covers are used here in an eastern chemical plant to keep materials clean and dry during temporary storage or during transport from point to point within the plant. They are made of no ordinary paper however; barrels are often...
This diagram shows a typical surface cross section as it might appear, magnified many thousands of times, under an electron microscope. The surface might be that of a fiber, or of a painted wall, or even wall paper. In Line No. 1, rough soil...
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...
The flame of an acetylene torch is shot through a tube of TD nickel, a new alloy, in a demonstration of the metal's stability at high temperatures. The new metal, produced at the DuPont Metals Center in Baltimore, is designed for use in space...
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...
To develop data so that better process equipment can be designed represents an important phase in research. This is the type of work which is done at the Engineering Research Laboratory at DuPont's Experimental Station where this engineer studies...
Caption: "This piece of Treading Anthracite weighs more than a ton. An inspector of the Philadelphia Reading Coal and Iron Company found that it contained no particles of rock or other impurities."
