When the [water] wheel is in motion it causes a current of cool air in the place throwing at the same time a spray of water in the air, which assists to cool it in the hot weather, a method invaluable for butter making. "
兩部丹麥進口的分離機可以在一小時內各處理一百五十加侖的牛乳，… … 當水車轉動時，會造成一股冷氣流，同時在空中灑出水氣，在炎熱的天氣中，有助於降低氣溫。這個方法對奶油的製造極有價值。」