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A wooden turnstile for keeping livestock penned in (Zwierzyniec, Poland).A circa-1930 turnstile and kiosk at the Bath Recreation Ground. Turnstiles were originally used, like other forms of stile, to allow human beings to pass while keeping sheep or other livestock penned in. [citation needed] The use of turnstiles in most modern applications has been credited to Clarence Saunders, who used ...
Cattle grid on country road. Cattle grids are usually installed on roads where they cross a fenceline, often at a boundary between public and private lands. [5] They are an alternative to the erection of gates that would need to be opened and closed when a vehicle passes, and are common where roads cross open moorland, rangeland or common land maintained by grazing, but where segregation of ...
Flash locks of this type have been documented in China since at least the 1st century BCE and on the Thames since at least 1295. [5] [6] Flash locks were commonly built into small dams or weirs where a head of water was used for powering a mill. The lock allowed boats to pass the weir while still allowing the mill to operate when the gate was ...
The boat enters the lock. 8–9. The boat enters the lock. 3. The lower gates are closed. 10. The upper gates are closed. 4–5. The lock is filled with water from upstream. 11–12. The lock is emptied by draining its water downstream. 6. The upper gates are opened. 13. The lower gates are opened. 7. The boat exits the lock. 14. The boat exits ...
The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for water when conventional locks were used to raise and lower canal boats ...
Supreme Court Chief Justice John Roberts slammed what he described as “dangerous” talk by some officials about ignoring federal court rulings, using an annual report weeks before President ...
A controlled study run by Rumin8 and University of New England found an impressive 81% reduction in methane emissions when cattle had access to water troughs treated with the tech company's ...
Gates vary in width from 3.5 metres (12 ft) to allow the passage of vehicles and tractors, to 12 metres (40 ft) on farm land to pass combines and swathers. One style of gate is called the Hampshire gate in the UK, a New Zealand gate in some areas, and often simply a "gate" elsewhere. Made of wire with posts attached at both ends and in the ...
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