#Crossness, the Cathedral in the Marshes. Detail from Bazelgette’s Grade I industrial building. 6 years to build a major sewer system for South London. Designed to cope with a doubling of the population.

1865 #Crossness engines. In these engines, the low pressure piston rod uses the more conventional parallel motion linkage, but the high and intermediate pressure rod does not connect to the end of the beam so there is no requirement to save space.