Chapter 6: Milk Industry
An Industrial Product
Fresh milk had become largely automated and fully modern by the middle of the twentieth century. A modern industrial system dominated by fewer and larger corporations grew to provide this pure, natural product that had formerly come from numerous small farms and distributers. In the consolidation that followed, a few firms took an ever larger role in the city’s economy. Sheffield Farms, Borden’s and the United States Dairy Products Company were known as the “Big Three.” By the 1920s, they held more than 60 percent of the city’s dairy business. Skeptical of monopolies, many complained that the “milk trust” was fixing high prices. Workers sometimes went on strike for higher wages and better benefits. But for most consumers, the assurances of safety and healthfulness that the large companies could provide overshadowed other concerns. The final compromise solution involved government regulation of pricing, a mixed set of inspection and certification processes, and the universal enforcement of pasteurization. By 1925, it was proudly proclaimed that “New York City is now said to have the best milk supply of any large city in the world.”
"The Sheffield Farms plant on 125th Street is almost operatic. It looks theatrical. It had an observatory so people were able to have direct access from the street to come in and just watch the mechanical process of the milk being bottled and packed and carted off. It was an industrial ballet that was absolutely fascinating to people at the time."
The business of producing, processing and distributing milk became a massive endeavor involving a quarter of a million workers. For New York City’s children to receive the milk they needed required 450,000 cows in states across the northeast, and in Canada. Eleven different railroads then transported the milk to 343 pasteurizing plants in the five boroughs. After being purified and bottled, the milk was loaded onto 5,500 wagons before finally being delivered to individual customers or stores.
In the 1930s and 1940s, the newly reformed product was embraced by an ever-wider circle of consumers. No longer just for children, adults began to drink milk, too; this led to the rise of a fad for Dairy Bars that took hold in the city and promised a healthy alternative to the typical lunch-counter fare. Uptowners took note. On West 135th Street, an entrepreneur opened Rose’s Dairy Lunch, the “Only Colored Dairy Lunch in New York,” which thrived by selling healthy food to local residents. The Amsterdam News, Harlem’s most-famous African American newspaper, reported that “improved methods of pasteurization, handling and distribution of milk have been the greatest help in safeguarding the purity of this important article of food,” and urged its readers to “Drink more Milk!”

Worker inspecting milk bottles during the sterilization process at Sheffield Dairy Farms plant, ca. 1926, Underwood Photo Archives.
Sheffield Dairy Farms workers using the new Sealcone paper containers to pack milk, replacing the glass bottle, ca. 1928, Underwood Photo Archives.
Sheffield Farms Plant, interior, 1937, The Museum of the City of New York.
Sheffield Farms sterilizing room, West 57th Street, interior, 1940, The Museum of the City of New York.
"March of Milk," Avery Architectural & Fine Arts Library, Columbia University.
“The bottles go round and round,” Avery Architectural & Fine Arts Library, Columbia University.
Pasteurizing milk by the batch or vat system, Milk-plant equipment, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
An automatic bottle washer, as high as 2,000 bottles per man per hour were washed with this type of machine, Milk-plant equipment, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Rotary filling and capping machine, Milk-plant equipment, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Turbine-brush bottle washer, bottles are rinsed by sprays of boiling water forced into them by pump, Milk-plant equipment, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Filling and capping bottles by machinery, note inspection of bottles both before and after filling, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
Pasteurizer and cooler of the internal-tube type, Milk-plant equipment, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Method of draining cans to prevent waste and jacketing cans to keep milk cool, Milk-plant equipment, Clarence Clement and Ernest Kelly, ca. 1920,U.S. Department of Agriculture, National Agriculture Library.
Dealers must keep a large supply of bottles on hand, fifty dealers bought on the average 120 bottles a month for every 100 bottles filled daily, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
Unloading delivery wagon, the driver puts the cases of empty bottles through the small door to the conveyor, at 8 plants using this system, an average of 30 wagons was unloaded per hour, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
Filling bottles by machine of lever type and capping by hand, Milk-plant equipment, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Inspection of milk on arrival at plant, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
Weighing milk, one man does nothing but record the weights, note overhead-lever type of scales, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
In-the-bottle pasteurizer, showing pumps which force the sprays of hot water over the bottles, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Continuous pasteurizer of the film or drum type, clarifier on right, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Dump or weigh can with platform scales, tanks sunk in floor to make dumping of milk easier, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Loading delivery wagons at plant using system E, an average of 34.3 wagons per hour were loaded at the 3 plants using this system, the average time required to load 1 wagon varied from 1.5 to 2.3 minutes, City Milk Plants, Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Front view of in-the-bottle pasteurizer, showing the fine sprays of hot water used in heating the milk, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Testing milk for butterfat content, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
Interior view of modern milk plant, showing pasteurizers, coolers and bottling machinery, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
A battery of machine fillers and cappers of the hand-lever type, an average of 768 bottles was filled and capped per man-hour at 21 plants using this type of machine, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
Automatic bottle washer, an average of 1,002 bottles per man-hour was washed at 56 plants using machines of this type, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
Machine filling and capping bottles, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Washing, steaming, and drying cans, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Bottling milk with automatic rotary-type machine, at 31 plants using this type of machine the average number of bottles filled and capped per man-hour was 701, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
Milk-storage tanks used in large plants to store milk at low temperature before it is pasteurized, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Battery of clarifiers used at a large plant, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Pasteurizer or the Danish or “kettle” type with retarder, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Automatic holding device for the pasteurization of milk, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Temperature controller for heating milk to desired temperature in pasteurization, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Type of automatic filling and capping machine, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Roller conveyers as labor-saving devices, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Compression type of refrigerating machine, Clarence Clement and Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Portion of receiving room, showing scales of overhead-lever type, weigh can, conveyer on which cans are conveyed to wash room, and fan to blow flies away from the milk, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
Rotary-type filler and capper, note conveyers used to convey the bottles from the bottle-storage room and, after being filled, to the milk-storage room, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
A battery of rotary automatic fillers and cappers, which special conveyer system which reduced the number of men required to operate the machines, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
Automatic bottle washer showing pumps, thermometers indicate the temperatures in the various tanks, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
Cleaning a milk cooler in a large plant, it is later steamed, Milk-plant operation, Clarence Clement, ca. 1923, U.S. Department of Agriculture, National Agriculture Library.
General View of equipment in gravity plant, City Milk Plants, Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
System of conveying cans and milk from the tracks to the dump tank, located at a considerable distance from the entrance to the receiving room, City Milk Plants, Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Gravity conveyers bringing cans of milk from trucks to power conveyer, which carries them to top floor where milk is dumped, City Milk Plants, Ernest Kelly, ca. 1920,U.S. Department of Agriculture, National Agriculture Library.
Dumping milk into weigh can from which it goes to glass-lined storage tank, this system of receiving milk was much more economical than the system of using freight elevators but not as economical as the system of dumping the milk at the ground floor and pumping it and washing the cans downstairs, City Milk Plants, Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Receiving room with can washer, City Milk Plants, Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Filling and capping department, the bottles, after being filled and put in the cases, are sent on gravity conveyers to the milk-storage room, City Milk Plants, Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Bottle-washing room, City Milk Plants, Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Milk-storage room using direct system of cooling with cooling coils overhead, City Milk Plants, Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.
Milk-storage room with indirect system of cooling, City Milk Plants, Ernest Kelly, ca. 1920, U.S. Department of Agriculture, National Agriculture Library.