The E. I du Pont de Nemours & Company minute books document an important era in the history of the company from just before the turn of the twentieth century through the 1930s. The DuPont Company in this time went through many changes in structure...
Handwritten on back: "#7. The root system of a fallen sequoia giant. Note how shallow the roots were imbedded in the soil. Although the roots do not penetrate the soil depply they spread out from the tree 100 feet or more."
Martin Pulich is Public Defender in Alameda Country, California, a civil servant and a brilliant lawyer. Eighty-six U.S. cities, counties or states and the associated Commonwealth of Puerto Rico have adopted the fast spreading Public Defender...
There are 887 armor piercing 20 mm cannon shells visible in this picture, hardly more than one third the completely load for the three pods (under Navy A4 jet) of the HIPEG gun system developed by Hughes Tool Company's Aircraft Division, Culver...
Lamp end of the absorption system of the ultra violet photometer shows a mercury lamp with glass envelope removed. Radiation from the lamp is rendered roughly parallel by condensing lenses of quartz and the light is reflected down the absorption...
Lantern slide depicting models used to illustrate elements of the Munsell Color System. This slide from Dorothy Nickerson lecture on Munsell Color System.
Lantern slide depicting models used to illustrate elements of the Munsell Color System. This slide from Dorothy Nickerson lecture on Munsell Color System.
