A portable rock crusher from the early th century

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60 Years of Pocket Portable Electronics

This historic date in 1954 goes well beyond a simple note on a gadget guru s calendar it marked the pivotal point for the explosion of rock and roll and the launching of the information age The timing of Elvis first hits fell into perfect alignment with the planets and the first available means to hear those revolutionary tunes on a teenager s own personal radio away from their disapproving...

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Portable Jaw Impact amp Cone Rock Crushers

Screen Machine Industries is a leading manufacturer of portable jaw impact and cone rock crushers screening plants trommels and conveyors and a global leader in design and innovation within the industry A complete equipment line is offered to fit a variety of...

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Mining and metallurgy in medieval Europe

Water power in medieval mining and metallurgy was introduced well before the 11th century but it was only in the 11th century that it was widely applied The introduction of the blast furnace mostly for iron smelting in all the established centres of metallurgy contributed to quantitative and qualitative improvement of the metal output making metallic iron available at a lower price...

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Hammerstone The Simplest and Oldest Stone Tool

nbsp 0183 32 A hammerstone or hammer stone is the archaeological term used for one of the oldest and simplest stone tools humans ever made a rock used as a prehistoric hammer to create percussion fractures on another rock The end result is the creation of sharp-edged stone flakes from the second rock from the second rock...

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Portable Police Lantern 1888 Old lanterns Portable

This portable police lantern was an oil lamp with a lens to focus light and a shutter to darken the flame without extinguishing it There are folding handles on the back and a clip for attaching it to a belt or strap The shutter is marked with quot B Putnam quot quot 1888 quot quot...

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Point Molate Mixed Use Project Narrative for BCDC DRB Submittal

th Century signaling the end of Native American presence on the site The site contains both shellmounds and other remnants of this early history The Point Molate site was used primarily for fishing commercial and naval activities in the 19 th thand 20...

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History of the petroleum industry

Parts of this article those related to Modern history need to be updated Please update this article to reflect recent events or newly available information The petroleum industry is not of recent origin but petroleum s current status as a key component of politics society and technology has its roots in the early 20th century...

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Mining Technology in the Nineteenth Century ONE

Early miners used Mexican arrastras or stamp mills which reached their peak in the late nineteenth century to crush ores into sand-size particles Before going to stamp mills ores often went through rock crushers which were like nutcrackers...

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The History of Marbles Games

Early attempts to compete with Germain production of handmade marbles provided commercially unsuccessful James Leighton who founded and worked for a variety of turn of the century marbles companies developed a new tool a mold on a pair of tongs...

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The History of Rock Music

This schizophrenia was already there in the 1960s when rock music encompassed everything from Dylan s folk-rock to King Crimson s progressive-rock and every decade added new subgenres Eventually rock music had become a genealogical tree of genres each one owing its existence to some predecessor going back all the way to the generation of Chuck Berry...

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Can You Name All Of These Kids Toys From the 60s

You don t have to have been raised in the 60s to have played with Barbies yo-yos and other popular toys from that groovy decade So take a trip back to your parent s childhood and see how many of these iconic 60s toys you can name from an image...

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Holy Monastery of Varlaam

Up to the 16 th century the presence of the monks was constant From the early part of the 17 th century onwards only a few monks remained Since then the decline starts 2 How could someone have access to the peak of the rock during the first years of the...

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5 Important Roman Siege Engines History Hit

Height is a great advantage in warfare and siege towers were a portable source The Romans were masters of these technological breakthroughs that date back at least as far as the 9 th century BC Rather than delivering soldiers to the tops of city walls most Roman siege towers were used to allow men on the ground to work at destroying the fortifications while covering fire and shelter was...

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History and Evolution

In the 15th century Europeans began building half-timbered houses with stone or brick foundations Tree trunks are placed at corners of the houses and strong wooden beams were used to support the house Then they fastened crossbeams at the top and...

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Rock Crusher History

History tells us it was in 1830 the first US patent was issued on a rock crushing machine It covered a device which in a crude way incorporated the drop hammer principle later used in the famous stamp mill whose history is so intimately linked with that of the golden age of mining In 1840 another patent was issued which comprised a wooden box containing a cylindrical drum apparently...

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20th century

The century had the first global-scale total wars between world powers across continents and oceans in World War I and World War became a major political issue in the world in the 20th century acknowledged in international law along with the right of nations to self-determination official decolonization in the mid-century and related regional conflicts...

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