Evolution of Time-keeping Devices in 1 minute | Clocks | Fools Den скачать в хорошем качестве

Evolution of Time-keeping Devices in 1 minute | Clocks | Fools Den

The earliest time keeping devices with a water-powered escapement mechanism, which transferred rotational energy into intermittent motions, dates back to 3rd century bc in ancient Greece, Chinese engineers later invented clocks incorporating mercury-powered escapement mechanisms in the 10th century, followed by Iranian engineers inventing water clocks driven by gears and weights in the 11th century It is for those students who are preparing for CLAT 2019-20. Students you can prepare at home by attending our live classes. You need not have to go to coaching classes and you can save lot of bucks. Don’t forget to like, share and subscribe to our channel. Follow us on our social platforms To Join CLAT COMPLETE ONLINE BATCH, follow link below https://www.foolsden.com/products/cla... Instagram:   / foolsden   To Know More about CLAT 2019 exam, pattern, syllabus & exam date, visit: https://www.foolsden.com Aspirants, You can join Fools Den Whatsapp Group @ +91-8889344974 Hurry!! Fools Den Youtube channel is India's most popular channel for Online Coaching for CLAT Exams. 1. To Buy Fools Den Test Series Click Here - http://store.foolsden.com 2. To get all latest videos in your mailbox, subscribe to our youtube channel -    / foolsdenjunior   3. Get all updates on Facebook, like us our facebook page -   / foolsden