MACHINE, SHOP, AND DRAFT PROBLEMS 

 v i: a *V" SHOP PROBLEMS 



117. Harses'Koes average 1 Ib. each at 4^0 per pound ; 

 nails average 112 to the pound, at 150 per pound. 



EXERCISE 



1. When a blacksmith furnishes shoes and nails, and 

 shoes a horse all round for 800, what does he receive for 

 his labor and the use of his tools ? When he charges $1.60 ? 



2. Inquire of your father how many shoes a work horse 

 will wear during a year and what the price of shoeing is. 

 Then estimate what it costs him to keep his horses shod for 

 a year. 



3. Iron that weighs 6.8 Ib. per foot is used in making 

 a set of tires for a wagon whose fore wheels are 42 in. 

 in diameter, the rear wheels 46 in. in diameter. At 40 per 

 pound, what will the iron cost for a set of tires ? 



4. What will be the cost of the leather to cover the seat 

 of a chair 13 in. in diameter, if the leather is bought in a 

 square at 500 per square foot? 



5. I can get a pair of shoes half-soled for 900. If it takes 

 12 oz. of leather valued at 500 per pound and 20 worth of 

 tacks to do the job, how much do I save by doing the work 

 myself ? 



6. A screw has 13 threads to the inch. How many turns 

 will it take to move it 2|- in. ? 



102 



