Changes in living and working conditions have led to disease spreading more rapidly. Towns have grown very quickly as factories lead to migrations from the countryside and immigration from different parts of Europe and the empire. As the demand for housing increases, the quality of homes constructed continues to drop lower. "Housing for is cramped, built quickly and built with little regard for hygiene."(Henry Mayhew, `Journeys through London'; 1849) In many cities the results are large areas where houses are small, roads narrow and services such as rubbish collection, sewage works and basic washing facilities non existent. In this type of climate bacteria grows quickly, the water supply is likely to become infected and weaker people are likely to fall ill much more rapidly. Housing and development must be transferred back to the countryside. In its most simplistic form, our problem is...