Another Little Ad:
Anyone paying attention to the ever-expanding links list on the left may have seen 'The Making of Medicine' that I have added under the scientific links section. This Swedish produced site - in English- is much more than a simple text history of medicine, and it's well worth checking out for a number of good reasons.
As to Winnipeg's lack of water towers I think I know the reason. The city has four reservoirs to supply various parts of the city. The pressure generated by the large amounts of water stored in this reservoirs is sufficient to compensate for the fact that they are not as elevated as the usual water tower. I wonder what happens in American cities.