To provide you with additional information about how we collect and use your personal data, we've recently updated our Privacy Policy and Terms of Service. Please review these pages now, as they apply to your continued use of our website.
  • Web 800x534px 28.22cm x 18.8cm@72dpi
  • HQ 2600x1734px 22.01cm x 14.7cm@300dpi
You can use this free image under the Creative Commons Zero (CC0) public domain license. Support our free section by adding a credit line next to the photo in your design. A suggestion is provided under the title.

Gears on Tide Predicting Machine No. 2

These gears pass some the energy provided by the operator turning a crank to the rear section of Tide Predicting Machine No. 2, a special purpose mechanical analog computer for predicting the height and time of high and low tides. The U.S. government used Tide Predicting Machine No. 2 from 1910 to 1965 to predict tides for ports around the world. The machine, also known as “Old Brass Brains,” uses an intricate arrangement of gears, pulleys, chains, slides, and other mechanical components to perform the computations. A person using the machine would require 2-3 days to compute a year’s tides at one location. A person performing the same calculations by hand would require hundreds of days to perform the work. The machine is 10.8 feet (3.3 m) long, 6.2 feet (1.9 m) high, and 2.0 feet (0.61 m) wide and weighs approximately 2,500 pounds (1134 kg). The operator powers the machine with a hand crank.
Pro Stock Photos From Dreamstime
Renewable Energy Concept - Metal Gears Stock ImageRenewable Energy Concept - Metal GearsQuestion Mark From Gears Stock PhotosQuestion Mark From GearsRetro Cogs Gears Technology Stock PhotographyRetro Cogs Gears TechnologyCogs Gears Brown Background Royalty Free Stock PhotoCogs Gears Brown BackgroundCogs And Gears System Stock ImageCogs And Gears SystemClock Gears Stock PhotographyClock GearsGears Vector Set Stock ImagesGears Vector SetMale Head With Gears Royalty Free Stock PhotoMale Head With GearsGears Royalty Free Stock PhotoGearsOld Gears Stock ImagesOld GearsCreative Gears Stock ImageCreative GearsGears Royalty Free Stock PhotographyGearsGears Royalty Free Stock PhotoGearsSet Of Gears Stock PhotographySet Of GearsMany Old Rusty Metal Gears Background Stock PhotosMany Old Rusty Metal Gears Background