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F146 Glass field type-E. 6-power, and glass field type-EE, (Navy) F147 Compass, prismatic, M1918, (Keuffel and Esser type) M4 Collimator Sight, used for both indirect fire and direct lay missions. F149 Instrument, Azimuth, M1918, M1918A2, M1 (Mils) F150; F151; F152 Arms scale M1906; F153 Corrector, wind, sound ranging, M1
The modern industrial sight glass is a glass disk held between two metal frames, which are secured by bolts and gaskets, or the glass disc is fused to the metal frame during manufacture. The glass used for this purpose is either soda lime glass or borosilicate glass , and the metal, usually a type of stainless steel, is chosen for desired ...
Jacoby sold the building to Alexander Brizard in 1880. A number of general stores operated out of the building, continuing to supply goods to mining camps in the Klamath and Trinity Mountains. Second and third floors were added in 1907 by architect Warren Porter Skillings. In 1963, the Jacoby Building became California Historical Landmark (CHL
Increase Niles Tarbox was born in 1815. He was among the original members of the New England Tarbox Family to rise to political and academic prominence in the region. His relations include U.S. Representative John K. Tarbox, John Tarbox (an important early Massachusetts colonist), and Jack M. Tarbox (an aviation engineer and executive).
The glass lenses are prone to breakage, and environmental conditions such as condensation, precipitation, dirt, and mud obscure external lenses. The sight's tube adds significant bulk and weight to the rifle. Snipers generally used moderate to high magnification sights with special reticles that allow them to estimate range to the target.
Charles Hemming Jacoby Jr. [2] (born 19 June 1954) is a retired United States Army general who served as the fifth Commander of United States Northern Command (USNORTHCOM) and the 22nd Commander of North American Aerospace Defense Command (NORAD). Jacoby was the first army officer to assume command of Northern Command.
The Tarbox Ramblers are a Boston-based roots and Americana band. The band's sound originally centered on arrangements of early twentieth-century blues, gospel and Appalachian music. It later included bandleader Michael Tarbox's original songs. The group's albums on the Rounder label include a self-titled debut and a second release, A Fix Back East.
Optical glass was vital to the warfare of this era for binoculars and gunsights and rubber was needed for tyres and communications cables. Britain had sourced the majority of its pre-war optical glass from the German company of Carl Zeiss AG and by early 1915 was suffering from a shortage.