32 



BULLETIN" 556/ U. S. DEPARTMENT OF AGEICTTLTTJBE. 



Hard ncss 



load 

 required 

 to imbed 

 a 0. 444- 

 inch ball 

 to one- 

 half its 

 diameter. 



•(spunod) apis 



IN 



C 



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c 



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o 

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o 



CM 



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•(qoui arenhs 



jad sprmod) nrniS oj jiqnoTpnadjad uoisuax 





c 



CC 



c 



CO 



oc 



C 



c 





o 



CN1 



o 



CO 



o 



CO 



•(qoui ajfenbs 

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CN 



c 



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i - 



c 



o 



<N 



c 

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CS 



o 



ca 



CM 



o 



CO 

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"(qoui 3XGnbs jad sprxnod) Iraqi otistqa ;b 

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co 



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CNl 



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£ « 

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cs 



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to 



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•(qoui ajtmbs 

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c 



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c 

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Shrinkago 



from green to 



oven-dry 



condition. 



•(uaejS uaqAv 

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CM 



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CO 





Specific 

 gravity 

 oven 

 dry, 

 based 

 on— 



•Ijp-uaAO uaqA\ amnion 



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