This film shows experiments carried out to measure the water flow and drainage through open concrete pipes at Ewden 14th-19th May 1936. Water is shown splashing through concrete tunnels and open-pipes, with different parts of the system labelled with different numbers. A bellmouth spillway is shown as water pours down it. A bellmouth spillway is shown with a worker holding a sign next to it which reads ‘Expt 20, Ht 2’-5, Q 2100.' Another sign is shown which reads ‘Expt 20, Ht 3’-0, Q...

This film shows experiments carried out to measure the water flow and drainage through open concrete pipes at Ewden 14th-19th May 1936. Water is shown splashing through concrete tunnels and open-pipes, with different parts of the system labelled with different numbers. A bellmouth spillway is shown as water pours down it. A bellmouth spillway is shown with a worker holding a sign next to it which reads ‘Expt 20, Ht 2’-5, Q 2100.' Another sign is shown which reads ‘Expt 20, Ht 3’-0, Q 2800’. A bellmouth spillway is shown as water pours down it. A bellmouth spillway is shown with a worker holding a sign next to it which reads ‘Expt 20, Ht 4’-0, Q 3350.’ A bellmouth spillway is shown as water pours down it. A bellmouth spillway is shown with a worker holding a sign next to it which reads ‘Expt 20, Ht 7’-0, Q 3900.’ A bellmouth spillway with different structural components is shown with a worker holding a sign next to it which reads ‘Expt 21, Ht 2’-5’, Q 2100.’ A bellmouth spillway is shown as water pours down it. A bellmouth spillway with different structural components is shown with a worker holding a sign next to it which reads ‘Expt 21, Ht 3’-9’, Q 3570.’ A bellmouth spillway is shown as water pours down it. A bellmouth spillway with different structural components is shown with a worker holding a sign next to it which reads ‘Expt 21, Ht 6-9, Q 3570.’ A bellmouth spillway is shown as water pours down it. Water flows from a pipe as a worker is holding a sign next to it which reads ‘Expt 21, Ht 9’-0”, Q4120’. The water is shown splashing down from the pipe through the open tunnel. A bellmouth spillway with different structural components is shown with a worker holding a sign next to it which reads ‘Expt 22, Ht 4’-0”, Q 3850.’ A bellmouth spillway is shown as water pours down it. A bellmouth spillway with different structural components is shown with a worker holding a sign next to it which reads ‘Expt 22, Ht 7’-0”, Q 4120.’ A bellmouth spillway is shown as water pours down it. A bellmouth spillway with different structural components is shown with a worker holding a sign next to it which reads ‘Expt 22, Ht 8’-0”, Q 4120.’ A bellmouth spillway is shown as water pours down it. A bellmouth spillway with different structural components is shown with a worker holding a sign next to it which reads ‘Expt 25, Ht 3’-0”, Q 2800.’ A bellmouth spillway is shown as water pours down it. A bellmouth spillway with different structural components is shown with a worker holding a sign next to it which reads ‘Expt 25, Ht 3’-7”, Q 3710.’ A bellmouth spillway is shown as water pours down it. A bellmouth spillway with different structural components is shown with a worker holding a sign next to it which reads ‘Expt 26, Ht 5’-2”, Q 4000.’ A bellmouth spillway is shown as water pours down it. A worker removes the top circular component of this particular bellmouth spillway. A bellmouth spillway is shown as water pours down it. A bellmouth spillway is shown with a worker holding a sign next to it which reads ‘Expt 26, Ht 5’-2”, Q 4000.’ The worker puts the extra structural component back on. A bellmouth spillway with different structural components shown with a worker holding a sign next to it which reads ‘Expt 26, Ht 5’-2ST, Q 4120.’ A bellmouth spillway is shown as water pours down it. A bellmouth spillway with different structural components is shown with a worker holding a sign next to it which reads ‘Expt 26, Ht 5’-3ST, Q 4120.’ A bellmouth spillway is shown as water pours down it. A worker puts wood debris in the water. It gets sucked immediately towards the middle of the bellmouth. A bellmouth spillway is shown as water and debris pours down it. Two workers are seen looking happy; they get out some cigarettes and lighting them.