532 FARM AND SCHOOL PROBLEMS. 



American Cast Iron 16,000 to 28,000 Ibs. per sq. in. 



Wrought Iron Wire (annealed) 30,000 to 60,000 Ibs. per sq. in. 



Wrought Iron Wire (hard) 50,000 to 110,000 Ibs. per sq. in. 



Wrought Iron Wire Ropes 38,000 Ibs. per sq. in. 



Rope (best manila) 12,000 Ibs. per sq. in. 



Rope (hemp) 15,000 Ibs. per sq. in. 



Leather Belts (1,500 to 5,000 good) 3,000 Ibs. per sq. in. 



Miscellaneous Practical Problems. 



1. A farmer wished to place five harness hooks at equal distance 

 apart on a board 4 ft, 2 in. long, each of the two outside hooks being 

 one inch from the nearest end of the board. How far apart will the 

 farmer make the holes for the hooks? 



2. A certain township is exactly six miles square. Its only school 

 house is in the exact center of the township. If all the roads run parallel 

 to the boundaries of the township, and the school house is on a cross 

 road, how far will the pupil who is the greatest distance possible away 

 from the school have to drive or walk to school? 



3. A man has a crop of 2,000 barrels of apples, which he sold at 

 $3.00 per barrel. In raising and harvesting the crop, he had employed 

 ten men ten days each, at $1.50 per day, to pick the apples; he had spent 

 in fertilizer $350 ; counting his own time, he had spent in spraying and 

 cultivating $500.00. What was the net income of his apple crop? 



4. A man invests in 320 acres of land at $200 per acre. He 

 erects buildings costing $10,000; he purchased farm equipment and ma- 

 chinery for $1,000. His annual net income from the farm after deducting 

 wages for himself, was $5,000. What per cent did he receive on his in- 

 vestment? 



5. In working the ordinary domestic pump about 20 strokes are 

 made per minute, and these will fill a pail holding 24 pounds of water ; 

 if 20 strokes are made in 3 minutes how many pounds of water may be 

 supplied in 2 hours? 



6. If domestic animals on the farm need water at the rate of 1 cu. 

 ft., per 1,000 Ibs., of weight per day ; how many pounds of stock can 

 be supplied for 1 day by a windmill or gas engine pumping at the rate 

 of 3 gallons per minute, for 3 hours? 



7. If a four inch tile' drain with a fall of 6 inches per hundred 

 feet, will discharge .49 cu. ft. per second, how many cu. ft. will it dis- 

 charge per second if the grade is doubled. 



For additional problems see : 



Elementary Agriculture Hatch and Haselwood Ross and Co., 

 Chicago. 



Farm Arithmetic Burkett and Swartzel Orange Judd Co., N. Y. 



