Sentence:  The following is an abstract of the <WSD>protocol</WSD> of the experiment: "Tumour extract."—A measured 16 c.c. of minced Rous Sarcoma tissue was ground with sand and extracted with 400 c.c. of 0.8-per-cent. saline. 
Meaning of the word marked with <WSD> tags:  The original notes of observations made during an experiment; also, the precise method for carrying out or reproducing a given experiment. (from 19th c.)