X--Fuel Value.

_Protein_ compounds, e.g., lean of meat, white of egg, casein (curd)
of milk, and gluten of wheat, make muscle, blood, bone, etc.

_Fats_, e.g., fat of meat, butter and oil, \
\ serve as fuel to yield
/ heat and muscular power.
_Carbohydrates_, e.g., starch and sugar, /

--------------+-------+------+--------------------------------------------|
| Price | Ten | |
| per | cents| Pounds of Nutrients and Calories of |
| pound.| will | Fuel Value in 10 cents worth. |
| | buy--| |
--------------+-------+------+--------------------------------------------|
| Cents.| Lbs. | 1 Lb. 2 Lbs. 3 Lbs. 4 Lbs. |
| | | 2000 Cal. 4000 Cal. 6000 Cal. 8000 Cal.|
| | | | | | | |
--------------+-------+------+---------|---------|---------|---------|----|
| | |PP|F| |
Beef, round | 12 | .83 |XXXXX| |
--------------+-------+------+---------|---------|---------|---------|----|
| | |P|F| |
Beef, sirloin | 18 | .55 |XXXXX| |
--------------+-------+------+---------|---------|---------|---------|----|
| | |P|F| |
Beef, rib | 16 | .63 |XXXXX| |
--------------+-------+------+---------|---------|---------|---------|----|
| | |PP|F| |