34 



BULLETIN 676, U. S. DEPARTMENT OF AGEICULTUBE. 



Tension. 



omxrej ' JO aDBjjng 



•ni -bs 

 lad 'sqi 



•IBipBj •ni -hs 

 Qiniiv-i JO aoBjmg jed 'sqq; 



i 

 > 



05 



o 



amirej ' jo aoBjing 



•sqq 



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ajnn^j jb aoBjmg 



•sqi 





•IBIlU9gnB^ 



amn^J ' JO aoBjmg 



•ui 'bs 

 J9d ' 'sq"-! 



'IBlpB.! 



emiiBj jb 90Bjing 



•ni -bs 

 i9d' "sqi: 



Hardness: 

 load recjuired 

 toemoeda 

 0.444-inch ball 

 one-half its 

 diameter. 



•eoBjins [•Bi:jii9SnBj, 



•sqi 



•aoBjms iBTp'BH 



•sqi 



•aoBjjms pna 



•sqi 



•jttati oi:;sEt8 je sswjs jaqg 

 'ureig 01 iBihoipttadjad^ ttoissajdmoo 



■ut •bs 

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d 

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IP 



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 Suiqsnio uinTnixByj; 



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d OS 

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•g.mirej 9^9iduioo 3ut 

 -smjo'dojtp JO :jqST9H; 



•saqoni 



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•m -no lad 

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•;i;iOT:jSBi9 JO sninpopi 



•UI -bs jad 

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•ni "no jad 

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•UI •bs jed 

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•9jn;dTU JO sninpoj;v; 



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OT^js^te %'e ssa'j^s jaqijL j lad "sqi 



add 

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