THE COLD PROCESS.--Four ounces of cold water are put into a clean quart bottle and the powder from one of the tubes. Shake the mixture thoroughly until the powder is dissolved. Add a pint of cold fresh milk, shake the bottle again and place directly on ice. When any of this milk is used the bottle should be again shaken and put immediately back on ice. If necessary this process may be modified so that partially or completely peptonized milk may be made. PARTIALLY PEPTONIZED MILK.--Put four ounces of water and a whole tube of powder into a clean pan and stir well; add a pint of cold milk and heat to the boiling point, stirring the mixture all the time. There should be enough heat to bring the milk to the boiling point in ten minutes. Allow the mixture to cool somewhat and strain into a clean jar, cork tightly and keep in a cool place. Shake the jar before and after using any of the contents. If partially peptonized milk is properly prepared it should not become bitter. COMPLETELY PEPTONIZED MILK.--Put four ounces of cold water and the powder contained in one of the tubes into a clean quart bottle and shake thoroughly. Add a pint of cold fresh milk and shake again; then place the bottle in a pan of warm water about 115 deg. F., or not too hot to place the hand in comfortably. Keep the bottle in the water bath for thirty minutes; then place the bottle directly on ice. USES OF PEPTONIZED MILK.--Partially peptonized milk is useful in young infants who have difficulty in digesting the curd of milk. Completely peptonized milk is frequently used during attacks of indigestion. It is used also to tide a delicate infant over a period when for some reason the digestive apparatus refuses to digest and assimilate even dilute mixtures. It is of value also in acute or chronic illness when the child has to be fed through a tube. When it is necessary to feed per rectum peptonized foods are often selected in preference to others. OBJECTIONS TO PEPTONIZED MILK.--Complete peptonization of milk renders the milk bitter. For this reason many children will not take it. Very young children whose sense of taste is not developed may be induced to take it after a few days. It is not wise to continue its use long because the function of the stomach will become accustomed to the use of predigested food and refuse to work when called upon. If it is used for a number of weeks it is wise to stop it gradually in order to permit the stomach to resume its function in a normal way.