7S0 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



ordinary water, soapy water, petroleum, olive oil), and the knife should 

 be wiped with a clean linen cloth. 



A fine-grained, smooth strop should be selected, and its under side 

 should be used. The under side is at first covered with connecting tissue, 

 but this has to be carefully rubbed away with emery paper so as to expose 



the corium. The strop, set on a pad of yielding felt, is then mounted on 

 a board and is ready for use. The knife is placed as in whetting, but is 

 urged forwards. A knife may be preserved from possible oxidation by 

 imbedding it in paraffin or fat. Some blades may be wrapped up in 



wadding. 



