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- 1931 Mack Model BJ Truck, "Dairylea Milk Products," July 1931 - Founded in Brooklyn, New York, in 1900, Mack Brothers Company relocated to Allentown, Pennsylvania, in 1905 and adopted the name Mack Trucks in 1922. Motorized trucks began to replace horse-drawn dairy delivery wagons early in the 20th century. Larger trucks delivered milk and other dairy products to commercial users like grocery stores and restaurants.

- July 01, 1931
- Collections - Artifact
1931 Mack Model BJ Truck, "Dairylea Milk Products," July 1931
Founded in Brooklyn, New York, in 1900, Mack Brothers Company relocated to Allentown, Pennsylvania, in 1905 and adopted the name Mack Trucks in 1922. Motorized trucks began to replace horse-drawn dairy delivery wagons early in the 20th century. Larger trucks delivered milk and other dairy products to commercial users like grocery stores and restaurants.
- 1931 Mack Model AC Tank Truck, "Dairymen's League," April 1931 - Founded in Brooklyn, New York, in 1900, Mack Brothers Company relocated to Allentown, Pennsylvania, in 1905 and adopted the name Mack Trucks in 1922. Mack-built tank trucks like this carried raw milk from farms to dairy processors and distributors. Tank trucks allowed for more flexible and more efficient shipment of milk than was previously possible by railroad.

- April 01, 1931
- Collections - Artifact
1931 Mack Model AC Tank Truck, "Dairymen's League," April 1931
Founded in Brooklyn, New York, in 1900, Mack Brothers Company relocated to Allentown, Pennsylvania, in 1905 and adopted the name Mack Trucks in 1922. Mack-built tank trucks like this carried raw milk from farms to dairy processors and distributors. Tank trucks allowed for more flexible and more efficient shipment of milk than was previously possible by railroad.
- 1931 Mack Model AC Tank Truck, "Dairymen's League," May 1931 - Founded in Brooklyn, New York, in 1900, Mack Brothers Company relocated to Allentown, Pennsylvania, in 1905 and adopted the name Mack Trucks in 1922. Mack-built tank trucks like this carried raw milk from farms to dairy processors and distributors. Tank trucks allowed for more flexible and more efficient shipment of milk than was previously possible by railroad.

- May 01, 1931
- Collections - Artifact
1931 Mack Model AC Tank Truck, "Dairymen's League," May 1931
Founded in Brooklyn, New York, in 1900, Mack Brothers Company relocated to Allentown, Pennsylvania, in 1905 and adopted the name Mack Trucks in 1922. Mack-built tank trucks like this carried raw milk from farms to dairy processors and distributors. Tank trucks allowed for more flexible and more efficient shipment of milk than was previously possible by railroad.
- 1929 Mack Model BB Tank Truck and Tank Trailer, "Dairymen's League," July 1929 - Founded in Brooklyn, New York, in 1900, Mack Brothers Company relocated to Allentown, Pennsylvania, in 1905 and adopted the name Mack Trucks in 1922. Mack-built tank trucks like this carried raw milk from farms to dairy processors and distributors. Tank trucks allowed for more flexible and more efficient shipment of milk than was previously possible by railroad.

- July 01, 1929
- Collections - Artifact
1929 Mack Model BB Tank Truck and Tank Trailer, "Dairymen's League," July 1929
Founded in Brooklyn, New York, in 1900, Mack Brothers Company relocated to Allentown, Pennsylvania, in 1905 and adopted the name Mack Trucks in 1922. Mack-built tank trucks like this carried raw milk from farms to dairy processors and distributors. Tank trucks allowed for more flexible and more efficient shipment of milk than was previously possible by railroad.
- 1936 Mack Model BXSW Truck Cab and Chassis, "Dairymen's League," October 1936 - Founded in Brooklyn, New York, in 1900, Mack Brothers Company relocated to Allentown, Pennsylvania, five years later. In 1922, the company renamed itself Mack Trucks and chose a bulldog as its mascot. According to lore, British soldiers admiringly called tough Mack trucks "bulldogs" during World War I. The bulldog was a beloved symbol of Great Britain.

- October 01, 1936
- Collections - Artifact
1936 Mack Model BXSW Truck Cab and Chassis, "Dairymen's League," October 1936
Founded in Brooklyn, New York, in 1900, Mack Brothers Company relocated to Allentown, Pennsylvania, five years later. In 1922, the company renamed itself Mack Trucks and chose a bulldog as its mascot. According to lore, British soldiers admiringly called tough Mack trucks "bulldogs" during World War I. The bulldog was a beloved symbol of Great Britain.
- 1934 Mack Model BM Tank Truck, "Dairylea Milk," December 1934 - Founded in Brooklyn, New York, in 1900, Mack Brothers Company relocated to Allentown, Pennsylvania, in 1905 and adopted the name Mack Trucks in 1922. Mack-built tank trucks like this carried raw milk from farms to dairy processors and distributors. Tank trucks allowed for more flexible and more efficient shipment of milk than was previously possible by railroad.

- December 01, 1934
- Collections - Artifact
1934 Mack Model BM Tank Truck, "Dairylea Milk," December 1934
Founded in Brooklyn, New York, in 1900, Mack Brothers Company relocated to Allentown, Pennsylvania, in 1905 and adopted the name Mack Trucks in 1922. Mack-built tank trucks like this carried raw milk from farms to dairy processors and distributors. Tank trucks allowed for more flexible and more efficient shipment of milk than was previously possible by railroad.
- 1935 Mack Model BM Statotherm Refrigerated Truck, "Dairylea Milk," September 1935 - Mack Trucks introduced its Statotherm refrigeration system about 1933. It placed a refrigerant -- usually dry ice -- in a special compartment, while electric blowers controlled by a highly sensitive thermostat circulated cool air throughout the truck body. In a test run from Florida to New York, the Statotherm system kept a truck's interior at a near-constant 33 degrees Fahrenheit.

- September 01, 1935
- Collections - Artifact
1935 Mack Model BM Statotherm Refrigerated Truck, "Dairylea Milk," September 1935
Mack Trucks introduced its Statotherm refrigeration system about 1933. It placed a refrigerant -- usually dry ice -- in a special compartment, while electric blowers controlled by a highly sensitive thermostat circulated cool air throughout the truck body. In a test run from Florida to New York, the Statotherm system kept a truck's interior at a near-constant 33 degrees Fahrenheit.