...The lower ones, relieved from the attrition and pressure of the upper, grow long and protruding, forcing the lower lip out in a hideous manner... 
David Livingstone 「Missionary Travels and Researches in South Africa」
...In the wild state sand and grit, entangled in the roots ofplants, help in the work of attrition, and, according to ProfessorW...
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
...The rocks are smoothed with the attrition of thealchemy of years...
Ernest Giles 「Australia Twice Traversed, The Romance of Exploration」
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