Millstone can be raised and lowered by screws to accommodate change in river levels. Boards attached to beam S, which can be raised or lowered, modulate the river's force through the mill.

Mechanics: undershot…

The water is then pumped back to the source.

Mechanics: overshot waterwheel; horizontal crankshaft; force pump; lantern and crown gear; crank and connecting rod.

Mechanics: horizontal waterwheel; spur gear and lantern.

Mechanics: horizontal waterwheel.

Mechanics: undershot waterwheel; spur gear and lantern; lantern and crown gear.

Workmen use shadoofs, counterweighted buckets on poles, to drain water from the section walled off by the cofferdam in order to secure foundations for construction.

Mechanics: shadoof.

Workmen use buckets to drain water from the section walled off by the cofferdam in order to secure foundations for construction.

Mechanics: hand crank; force pump; double interrupted crown gears and lantern gear; worm and worm gear; lantern and rack; flywheel; roller guides.

Mechanics: undershot waterwheel; Archimedean screw; angle spur gears; lantern and crown gear.

Mechanics: undershot waterwheel; horizontal crankshaft; force pump; horizontal working beam; crank and connecting rod.

Advertisement about using various models of Beckman pH meters for monitoring water quality in industrial settings.

Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California…

The Beckman Water Quality System incorporates Hach Company instruments.