548 THE HANDBOOK FOR PRACTICAL FARMERS 



Suitable Distances for Planting — Continued 



Peaches 



Apricots 



Nectarines . . . 



Quinces 



Currants 



Gooseberries .. 

 Raspberries . . 

 Blackberries .. 

 Grapes 



16 to 18 feet apart each way 



16 to 18 feet apart each way 



16 to 18 feet apart each way 



10 to 12 feet apart each way 



3 to 4 feet apart each way 



3 to 4 feet apart each way 



3 to 5 feet apart each way 



6 to 7 feet apart each way 



8 to 12 feet apart each way 



To estimate the number of plants required for an acre, at any 

 given distance, multiply the distance between the rows by the 

 distance between the plants, which will give the number of 

 square feet allotted to each plant, and divide the number of 

 square feet in an acre (43,560) by this number. The quotient 

 will be the number of plants required. 



USEFUL INFORMATION 



To find the diameter of a circle multiply circumference by 

 .31831. 



To find circumference of a circle multiply diameter by 3.1416. 



To find area of a circle multiply square of diameter by .7854. 



To find surface of a ball multiply square of diameter by 

 3.1416. 



To find side of an equal square multiply diameter by .8862. 



To find cubic inches in a ball multiply cube of diameter by 

 .5236. 



Doubling the diameter of a pipe increases its capacity four 

 times. 



Double riveting is from sixteen to twenty per cent stronger 

 than single. 



One cubic foot of anthracite coal weighs about fifty-eight 

 pounds. 



One cubic foot of bituminous coal weighs from forty-seven to 

 fifty pounds. 



One ton of coal is equivalent to two cords of wood for steam 

 purposes. 



A gallon of water (U. S. Standard) weighs eight and one-half 

 pounds and contains two hundred and thirty-one cubic inches. 



There are nine square feet of heating surface to each square 

 foot of grate surface. 



A cubic foot of water contains seven and one-half gallons, one 

 thousand seven hundred and twenty-eight cubic inches, and 

 weighs sixty-two and one-half pounds. 



