Of the remaining mysteries surrounding the Watergate break-in, none confound conspiracy buffs more than the 18 and a half minutes of tape deleted from the June 20th, 1972 meeting in the Oval Office. Now, after 37 years and several forensic analyses of the audio tape itself, the National Archives will turn its attention to the only physical notes taken during that meeting in the hope of extracting more information about the famous recording gap.
This multiple tape recorder removes the last obstacle to commercial recordings on magnetic tape -- the mass production of duplicate tapes. It makes eight duplicates at once at three times normal speed. It can also record two sound tracks on the same tape at the same time. Thus the machine can turn out eight hour-long recordings in 10 minutes, or 48 an hour.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.