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Two legs, long and thin and brown, could be seen teetering slowly through the woods in the Roman empire some 2,000 years ago. From each leg's top, a weight dangled on a long string. The legs, about 20 feet (6 m) apart, were connected on top with a wooden beam.
The idea, now, was to position the construction — called chorobate — such that the strings and legs were perfectly aligned. The top beam level, the chorobate was used to survey and measure heights with precision.
This accuracy allowed Roman engineers to construct aqueducts that sent lots of water over large distances at mostly constant speed and without spilling.
One foot on your computer and the other on the net, Sparrow allows you to send even lots of bytes in a file over large distances fast and without overflowing mailboxes:
Send files easily just about no matter their size. Sparrow uploads files and folders to Dropbox for you and inserts the link, too.

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