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170

Lake Arrowhead California 1920s Postcard Arrowhead Woods in Fleming Grove

LakeArrowhead (#1) 221 days ago Shop lake arrowhead california 1920s postcard arrowhead woods fleming grove All http://rover.ebay.com   Discuss  | Add To 
$3.96End Date: Tuesday Mar-5-2019 11:34:10 PSTBuy It Now for only: $3.96Buy It Now | Add to watch list
90

Lake Arrowhead, Arrowhead Woods, CA "Discovery Rides" ca 1920s Vintage Postcard

LakeArrowhead (#1) 226 days ago Shop lake arrowhead arrowhead woods ca discovery rides ca 1920s vintage postcard All http://rover.ebay.com   Discuss  | Add To 
$7.50 (0 Bids)End Date: Monday Feb-11-2019 17:07:36 PSTBid now | Add to watch list
156

Humans have been causing earthquakes in Texas since the 1920s

LakeArrowhead (#1) 1223 days ago Science humans causing earthquakes texas 1920s All https://www.sciencedaily.com   Discuss  | Add To 
Earthquakes triggered by human activity have been happening in Texas since at least 1925, and they have been widespread throughout the state ever since, according to a new historical review of the evidence.
168

Historian discusses the threat birds posed to the power grid in 1920s California

LakeArrowhead (#1) 1570 days ago Science historian discusses threat birds posed power grid 1920s california All http://feeds.sciencedaily.com   Discuss  | Add To 
In 1913 in Southern California, two 241-mile-long electric lines began carrying power from hydroelectric dams in the Sierra Nevada to customers in Los Angeles--a massive feat of infrastructure. In 1923, power company Southern California Edison upgraded the line to carry 220,000 volts, among the highest voltage lines in the world at the time. Now a new paper examines a threat to that power grid: voluminous streams of bird excrement.

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