This section is from the book "Cooking Vegetables. Practical American Cookery", by Jules Arthur Harder. Also available from Amazon: The Physiology Of Taste.
Fecule. Fecit la.
No. 719. - Fecula is the nutritious part of wheat, starch, farina or potatoes. It is used in sauces and soups, being devoid of flavor, and is nutritious, healthful and light. It can be used for every purpose that arrow root is used for. In cooking Fecula for invalids, it should be first diluted in cold water and then put in boiling milk, broth or water. About two spoonfuls is sufficient for a pint of liquid. Stir it well when putting it in. Let it cook for about twenty minutes, and then season or sweeten it as may be desired.
 
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