give an average composition: there are sticks of eating chocolate
which contain as little as 24 per cent. of cacao butter, whilst
chocolate used for covering contains about 36 per cent. of butter.

As modern high-class eating chocolate contains about 31 per cent. of
butter, we will take this for purposes of calculation:

AVERAGE COMPOSITION AND FUEL VALUE OF ENGLISH EATING CHOCOLATE.

_Composition_ _Energy-giving power_

_Calories per lb._
Cacao Butter 31.4 = 1,327
Protein (total nitrogen 0.78%) 4.1 = 76
Cacao Starch 2.3 } = 162
Other Digestible Carbohydrates, etc. 6.4 }
Stimulants { Theobromine 0.3
{ Caffein 0.1
Mineral Matter 1.2
Crude Fibre 0.9
Moisture 1.0
Sugar 52.3 = 973
----- -----
100.0 2,538

In Snyder's _Human Foods_ (1916) the official analyses of 163 common
foods are given. They include practically everything that human beings
eat, and only three are greater than chocolate in energy-giving power.

The result (2,538 calories per lb.) which we obtain by calculation is
lower than the figure (2,768 calories per lb.) for chocolate given by
Sherman in his book on _Food and Nutrition_ (1918). Probably his figure
is for unsweetened chocolate. The table below shows the energy-giving
value of cocoa and chocolate compared with well-known foodstuffs. The
figures (save for "eating" chocolate) are taken from Sherman's book, and
are calculated from the analyses given in Bulletin 28 of the United
States Department of Agriculture:

FUEL VALUE OF FOODSTUFFS.

_Foodstuff as _Calories
Purchased._ per lb._
Cabbage 121
Cod Fish 209
Apples 214
Potatoes 302
Milk 314
Eggs 594
Beef Steak 960
Bread (average white) 1,180
Oatmeal 1,811
Sugar 1,815
Cocoa 2,258
Eating Chocolate 2,538

[Illustration: PACKING CHOCOLATES AT BOURNVILLE.]

_Food Value of Milk Chocolate._

The value of milk as