Apparently many of you are interested in rotary snowplows. Here are some additional links to information and videos about rotaries.
Exhibit one: Rotary 1 on the White Pass and Yukon
Exhibit two: Union Pacific rotary 900082
Exhibit three: Although a little out of date, here is a list of remaining rotaries
Exhibit four: HistoryLink's entry for the Museum's rotary 10
Exhibit five: Garden railway rotary snowplow model in action
Exhibit six: Rotary snowplow demo at Portola, CA
Exhibit seven: Sample footage of 1952 Southern Pacific rotary action