ii8 
THOMPSON YATES LABORATORIES REPORT 
Dead Ends 
It was important to determine how far bacteria multiplied in the stagnant water at dead 
ends of mains. When the water in a dead end is allowed to flow out the first rush is often clear, 
but it is immediately followed by black and rusty water. Much to my surprise the number of 
bacteria present in the very black and rusty water is very small. The highest number out of the 
numerous series of analyses was 1,500 per c.c, and the average was about 600 per c.c. 
When the water had become clear again, which usually takes place in 7 to 10 minutes, the 
average came down to 40 per c.c. These observations are most satisfactory. 
BACTERIOLOGICAL INVESTIGATIONS FOR OTHER 
CORPORATE BODIES 
Arrangements have recently been made with the Waterloo and Seaforth District 
Council, with the Urban District Council of Hindley, and with the Corporations of Warrington 
and WiGAN, for systematic bacteriological analyses, and the report of the work done for these 
bodies will appear in a subsequent volume oi the Thompson Tatcs Laboratory Reports. 
