Six types of photopolymer printing plates are now available from DuPont's first plant for Dycril at Parlin, New Jersey. These include the large unexposed plate in the background. This and two other types of thin flexible plates, as shown, are now...
Typed caption: "Dr. M.D. Leonard, in charge of the Pest Control Laboratory at the DuPont Company's World Fair exibit, points out a 'rotary seed treater' to Mary Sheridan. It is a new feature, demonstrating how seeds are chemically treated to check...
Written caption: "Run-of-mine coal is fed by the carload into the rotary dumps at the left of this picture." Philadelphia and Reading Coal & Iron Company.
