One gentleman, Hiroyuki Goto, recited no less than 42,000 digits of pi from memory in 1995. This record feat took him about nine hours to complete. Pi = 3.1415926535897932384626433832795028841971... The most common type of mnemonic is the word-length mnemonic in which the number of letters in each word corresponds to a digit. This simple one gives pi to seven decimal places: How I wish I could calculate pi. This longer one, giving fifteen decimal places of pi, is popular with students: How I like a drink, alcoholic of course,
Written By: Astoria Bridge, also called Astoria-Megler Bridge or Columbia River (Astoria) Bridge, bridge spanning the mouth of the Columbia River between the states of Oregon and Washington, western United States. At its completion in 1966, it was the longest continuous-truss bridge in the world. The bridge, stretching from Astoria, Ore., to Point Ellice (near Megler), Wash., provided the final link in the U.S. highway system between Mexico and Canada when it opened to traffic.
Today, many people call Rockville Bridge the longest stone-arch bridge in the world, but that's only partly trueâonly the visible outer layer of its form is stone. The piers and spandrels (the area between the arches) are filled with concrete, making it technically a composite structure. In all, the bridge required not only 220,000 tons of stone but an estimated 600,000 barrels of cement. Measuring 3,820 feet long, it carries four tracks at an elevation fifty-two feet above the river's low-water mark. The price tag was $975,150. The bridge opened on March 30, 1902.