In Pounds and Inches an apple day is done with minimal water. Only sips to quench the thirst.
"An apple-day begins at lunch and continues until just before lunch of the following day. The patients are given six large apples and are told to eat one whenever they feel the desire though six apples is the maximum allowed. During an apple-day no other food or liquids except plain water are allowed and of water they may only drink just enough to quench an uncomfortable thirst if eating an apple still leaves them thirsty. Most patients feel no need for water and are quite happy with their six apples. Needless to say, an apple-day may never be given on the day on which there is no injection. The apple-day produces a gratifying loss of weight on the following day, chiefly due to the elimination of water. This water is not regained when the patients resume their normal 500-Calorie diet at lunch, and on the following days they continue to lose weight satisfactorily."