The fascinating Rotolactor, where milk cows are standing on a fascinating merry go round as they are being collectively milked was big local news back in 1930 when the company threw the doors open to the public to see the very latest in sanitary dairy procedures. I am probably one of many who went on a school trip to witness that incredibly interesting concept. Through the years it was a "must visit" for anyone in the very rural town of Plainsboro. The unit was disassembled in 1979.
