Salting trough, lead lined, on stand, 20th century Salting trough, lead lined, on stand, 20th century 1901-2000
Wooden lead lined trough, from laboratory bench. Laboratory bench from Municipal Technical School, c1920s. trough
wooden Shoe (sloping trough), scale 1:12, part of the Sprowston Mill model. wooden Shoe (sloping trough)
Four wooden troughs for sewing machine tables, some with circular attachments on each end. Four wooden troughs for sewing machine tables
Two vertical glass mercury troughs, used by Sir William Ramsay during his researches on the rare gases of the atmosphere Two vertical glass mercury troughs
