n . In the hand - rivetted f - inch plates , slipping began at 16 per cent . of the breaking strain , and in the machine - rivetted at 28 per Cent . This appears to show conclusively that , regarded from a practical point of view , machine rivetting possesses very decided superiority over hand work… … Scale FlG . 31 . rivets single rivetted by hand 2J tons , for f - inch rivets double rivetted by hand 3 to 3 | tons , for f - inch rivets double rivetted by machine 7 tons . The corresponding loads for 1 - inch rivets were 3 ' 2 , 4 ' 3 , and 8 to 10 tons respectively . It is thought that the load…
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