Sentence:  The DEAE-cellulose , containing 0.78 mEq of N / g , was prepared in our laboratory by the <WSD>method</WSD> of Peterson and Sober ( 7 ) from powdered cellulose , 100 - 230 mesh . 
Meaning of the word marked with <WSD> tags:  a way of doing something, especially a systematic way; implies an orderly logical arrangement (usually in steps)