Text from back of image: "Photo shows Henry Woodhouse, New York writer and authority on aeronautics, who was subpoenaed today, 2-26-24, to appear before the Senate Oil Committee and testify concerning charges he is reported to have made to the...
Periodicals; Chemical industry; Explosives; Dynamite;
Table of Contents: Conservation; Excavating Lake Washington Canal; Dependability; Smokeless Bananas; Ballistite Unhurt by Three Months' Immersion; Practical Explosives Efficiency; Two or More Electric Blasting Caps in a Bore Hole; Depth of Charges...
Table of Contents: Uncommon carriers; The south's new industry; How silica sand is produced; With the American sea forces; And now, colorful luggage; Proper priming of dynamite charges is important; Salvaging best sellers; Pyralin aid aviation;...
Correspondence; Gunpowder; Ordnance industry; Government contracts;
Mason reports that the Du Pont powder has been examined and approved. He sends payment for the gunpowder. Letter also includes freight charges for transporting gunpowder from Wilmington and Philadelphia to Indian factories.
This scene shows part of the loading of large cartridges of DuPont 60% gelatin dynamite in the Susquehanna River near Marietta, Pennsylvania. The cartridges were five inches in diameter, 24 inches long and weighed 25 pounds each. The illustration...
Caption: "A Miner is shown operating a high power electric drill which rapidly bores deep holes for the explosive charges which break loose the coal buried deeply beneath the mountains."
Caption: "THis miner is using a Pneumatic Drill to bore into the face of the coal. Powder charges are place in the holes and exploded, breaking the coal into lumps for transportation to the surface. The miner's safety lamp is hung on a nail above...
Text on back: "'Okies' are always on the move – types that go to California to better their life of farm tenancy are all called Okies, whether they are from Oklahoma, Kansas, Nebraska, or Colorado. Some are going, some are returning. Okies can...
Cartes de visite; Physicians; Military officers; Portrait photographs
Carte de visite from an album possibly assembled by Henry Algernon du Pont. Handwritten caption: "Dr. Hammond, U.S. Army" Hammond served at Surgeon General of the U.S. Army in 1862-63. He tried to implement numerous reforms of military medical...
