This section is from the book "A Handbook Of Invalid Cooking", by Mary A. Boland. Also available from Amazon: Handbook of Invalid Cooking.
(sweet whey)
1 Pint of milk heated to 100° Fahr.
1 Teaspoon of prepared rennet.
2 Tablespoons of wine.
Stir the rennet and wine into the milk quickly, so that the wine may not curdle the milk in blotches. Let it stand in a warm place (on the stove-hearth, for instance) for half an hour, and then separate the curd from the whey by straining. This whey is excellent for children with delicate digestion who need a little stimulant. It is very good also as a drink for invalids at any time.
Whey is the water of milk with the sugar and various salts of the milk in solution in it. The sugar furnishes some nutriment, and the salts supply some of the mineral matter needed in the body.
Whey may also be made with vinegar or lemon-juice. These acids will act more quickly when the milk is warmed before they are added.
1 Lemon.
1 1/2 Tablespoons of sugar.
1 Cup of boiling water.
Wash and wipe a lemon, cut a very thin slice from the middle, and squeeze the rest into a bowl; then put in the sugar, pour on the boiling water, and strain it. When it has become cold, serve it in a tumbler with the slice of lemon floating on the top.
Lemonade has a better flavor when made with boiling water, though it may be made with cold water. A few strawberries or raspberries may be put in, instead of the slice of lemon; or it may be colored pink with a little grape-jelly or carmine, and served with a straw.
1 Tablespoon of sugar. 1 Cup of boiling water. 1/4 Cup of lemon-juice. 1/4 Cup of sherry. l 1/4 Cups of cold milk.
Pour the boiling water over the sugar, and then put in the lemon-juice and sherry. Stir it until the sugar dissolves, add the cold milk, and stir again until the milk curdles, then strain through a jelly-bag or napkin.
This is a cool and refreshing drink, especially for children.
Heat some milk in a granite saucepan for half- an hour to sterilize it, but do not let it boil; then pour it into a pitcher, and set it aside to cool. When the milk is cold, beat one egg with one tablespoon of sugar until the sugar is well mixed; add to it two tablespoons of brandy and a cup of the cold milk. Strain it into a tall slender glass, and serve at once.
Heating the milk renders it perfectly wholesome and much safer for an invalid than raw milk, and also improves the flavor of the drink.
Break an egg into a bowl, and put in a teaspoon of sugar; beat the two together until the sugar is thoroughly mixed with the egg, but not enough to make the egg froth; to this add two tablespoons of sherry wine, and a fourth of a cup of cold water, mixing them thoroughly. Strain all into a tumbler, and serve immediately.
Mix equal quantities of sterilized milk and seltzer-water. Drink immediately.
1 For a further account of micro-organisms in milk, see the chapter on Milk.
 
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