I mention this case to show what are the principal requirements of food for human consumption. There must be a vehicle if alimentation is to be normal. This vehicle is generally known as ashes. It is to the human alimentary system what bread is to butter and meat in the sandwich. Through it are distributed the actual food elements, and in their preparation for absorption it occupies the place of the sand and grit we find in the crop of the fowl. In the toothsome cake I have described, these factors had been duly honored, and for that reason the cake was a success even at the price it sold for--an ounce for three cents.
The first war-bread baked was a superior sort of rye bread, containing in proportions 55, 25, 20, rye flour, wheat flour, and potato meal or flakes, sugar, and fat. That was no great trick, of course. Any baker could have thought of that. But rye and wheat flour were not always plentiful, even when government decree insisted that they be milled to 85 per cent. flour, leaving 15 per cent, as bran--the very outer hull. Oats, Indian corn, barley, beans, peas, and buckwheat meal had to be added as time went on.
That was a more difficult undertaking and afforded the scientist the chance to do yeoman service. He was not found wanting.
Imports of coffee had become impossible in 1916. The scant stores on hand had been stretched and extenuated by the use of chicory and similar supplements. I used to wonder how it was possible to make so little go so far, despite the fact that the _demi-tasse_ was coffee mostly in color by this time.
A period of transition from coffee to coffee substitutes came.
The first substitute was not a bad one. It was made mostly of roasted barley and oats and its flavor had been well touched off by chemicals won from coal-tar. The brew had the advantage of containing a good percentage of nutritive elements. Taken with a little milk and sugar it had all the advantages of coffee, minus the effect of caffeine and plus the value of the food particles. It was palatable even when taken with sugar only. Without this complement it was impossible, however.
But the grain so used could be put to better purpose. This led to the introduction of the substitute of a substitute. The next sort of artificial coffee--_Kaffee-ersatz_--was made of roasted acorns and beechnuts, with just enough roasted barley to build up a coffee flavor. This product, too, was healthful. It may even be said that it was a little better than the first substitute. It certainly was more nourishing, but also more expensive.