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...
This photograph shows a camphor flaker at the camphor plant of E.I. du Pont Nemours & Company at Deepwater Point NJ. At this plant camphor is manufactured for medical as well as industrial use. This latter is known as technical camphor. Technical...
Written on back: "Comes a hot summer night and nothing will be more appreciated than a pair of cool, feather-weight 'Ban-Lon' pajamas with loose, unencumbered lines. Easy tee-shirt styling makes these the coolest of the cool. Manufacturer:...
On back: "Dear Alice, Our Bessie is still laid up and will be till we start for home next Thursday. She is better but it seems a very slow process. the rest of us are well and Liz is having the time of her life. You have been so thoughtful as...
