EXERCISE A-9. TO DETERMINE THE WEIGHT OF 



SOIL PER CUBIC FOOT. 



Equipment: Balance; brass cylinder* or quart can; 

 samples of sandy loam and clay soils. 



Method: Fill the quart can with the dry sandy loam 

 and compact by tapping it lightly on the desk four times. 



Fig. 10. — A very good Balance of this Type can be Purchased for 



about $8.00. 



Stroke off the soil level with the top of the can and weigh. 

 Subtract the weight of the empty can. 



Calculate the capacity of the can in cubic inches and 

 from the weight of the dry soil determine the weight of 

 one cubic foot. 



* Brass cylinders for this exercise may be purchased from labora- 

 tory supply houses at a cost of about $1.00 each. 



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