Page 20: Bun Phay, left, is operating a Magnuflux machine
used to detect minute cracks in vital engine parts thus cutting possible
engine failure to a minimum. Three of the mechanics have taken special
training in the operation of this machine from...
Page 19: Frank Brockway, operating the Sunnen Reamer.
Earl Clark, overhauling a carburetor. We have all parts and complete
testing equipment for carburetors.
Two miners working underground. Light is provided by carbide lamps attached to the miners hats. Miner in foreground is operating a column mounted drill.
Arthur F. Baumhoff operating a Caterpiller tractor ahead of one of his dredges owned jointly with E. T. Fisher near Centerville, Idaho. Note close connected bucketline dredge in the background.
Miner operating brake and reverse engine. Close up of pipes, springs, bearings, and valves. A mining employee is featured in the right side of the photo.
Hydraulic placer mining on the Boise River near Twin Springs in Elmore County, Idaho. Photo shows a miner operating a hydraulic giant on a hillside while another miner is inspecting the runoff in the ground sluice below.
Postal service-Idaho-History-Sources. --Covers (Philately)-Idaho. --Letterheads-Idaho.
Idaho covers, letterhead, and franked envelopes. Included are examples of Ada and Alturas counties' letterheads, franked envelopes from express companies operating in Idaho's mining districts, Idaho post office covers, and letterheads from the...