Posted Online: Oct. 31, 2012, 12:00 am

Today in history for Wednesday, Oct. 31, 2012

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Today is Wednesday, Oct. 31, the 305th day of 2012. There are 61 days left in the year.
1862 — 150 years ago: Seth Thomas clocks are being advertised — cheap — at all jewelryand watch repair stores in the city.
1887 — 125 years ago: Three Japanese army and navy officers are in Rock Island andtomorrow will inspect the Rock Island Arsenal.
1912 — 100 years ago: The Mississippi River will be closed to traffic for the season aftertomorrow night, due to operations at Keokuk where a power dam is under construction.
1937 — 75 years ago: The Dionne quintuplets — all five of them — come closer to beingexactly alike than any pair or group of children ever studied by science before — this factis revealed from study of biologists during the first 40 months of their lives.
1962 — 50 years ago: When the bright satin ribbon is snipped at 9:45 a.m. tomorrow, thefirst two and major units of Rock Island's new $2 million Watch Tower Plaza will beofficially opened to the public. Zayre Department Store and the new Eagle Food Centerare the first of six initial units of the shopping center located on 11th St., between 37th and 39th Aves.
1987 — 25 years ago: In celebration of its 4th anniversary, the Augustana Research Foundation will have an open house from 9:30 a.m. to noon Nov. 7 at the foundation's laboratories in Wallberg Hall on the college campus. Included will be demonstrations of equipment and exhibits of current research.