Photograph dated Jan. 7, 1941. Original caption reads: "Allis-Chalmers tractors and Baker "V" type snowplow units used for plowing sidewalks. These four snowplow units replaced the thirteen horse-drawn units that had always been used previously. No. 1 and No. 2 Tractors were purchased in November, 1939 and No. 3 and No. 4 Tractors were purchased in November, 1940. These units do the entire sidewalk plowing consisting of approximately 130 miles of sidewalks in the city of Burlington at very much less cost and much more efficiently than the old horse-drawn units. The trailer sleds shown in the picture were used for sanding sidewalks during the winter 1940-41."