Winnipeg Electric Company was doing all in its power to reduce vibration to houses from trolley buses but no changes to bus design could be countenanced because of prohibitive costs.

Safety committee learned Wednesday from City Engineer W. D. Hurst that he had consulted company officials to find what could be done to reduce that part of vibration which might be due to the buses.

He reported the company had informed him it could not reduce its free running speed of buses without reducing the average speed for a route from 10 to six or seven miles per hour "in which case, you may as well have a transit system."

In any case, the National Research Council, in its survey of the problem, had reported increased speed did not increase vibration, Mr. Hurst added.

He said the company had promised research into springing of vehicles would be continued, tests with lower air pressure in tires had been carried out with no beneficial effects, and that larger tires could only be fitted after making a complete redesign of trolley buses.

Mr. Hurst said the N.R.C. had informed him it would carry out further studies in Winnipeg in January or February to find out whether the effects of vibration were worse in winter than summer.