FOOD 57 



EXERCISE 



1. How many pounds of wheat bread will it take to pro- 

 duce 16 oz. of carbohydrate ? 



2. How much roast beef will it take to produce 4 oz. of 

 proteid ? 



3. How many pints of milk will it take to yield 4 oz. of 

 fat? (16oz. = lpt.) 



4. How much butter will it take to produce 1 oz. of fat ? 



69. It is household economy to be able to work out in 

 dollars and cents the comparative values of different foods. 

 This may be done by finding the cost of a pound each of 

 proteid, fat, and carbohydrate in different foods. 



EXAMPLE. If a loaf of bread weighing 1 Ib. sells for 50, and by 

 analysis 8.9% of it is found to be proteid, what is the cost of 1 Ib. of 

 proteid ? 



SOLUTION. 50 = the cost of 8.9% of 1 Ib. 



The cost of 1 Ib. = $0.05 -* .089 = $0.56 -. 



EXERCISE 



1. Find the cost of 1 Ib. of proteid in milk which sells at 

 50 per quart and which by analysis shows 3.4% proteid. 



2. Find the cost of 1 Ib. of proteid in roast pork which 

 sells at 12 J0 per pound and which by analysis shows 14% 

 proteid. 



3. Find the cost of 1 Ib. of proteid in sirloin steak which 

 sells at 200 per pound and which by analysis shows 19% 

 proteid. 



4. Which of the above-mentioned foods is the most eco- 

 nomical muscle-producing food ? 



5. Estimate which is the cheapest food for producing fat 

 and heat: (1) butter, which is 85% fat, at 250 per pound; 



