Meteorological Record

1902 Boston Medical and Surgical Journal  
determine tho purity, or, rather, relative purity (as there can be no absolute purity) of the virus. I also showed that the efficiency of tho virus could be satisfactorily testod upon rabbits and calves, and that a more certain method of determining the exact efficiency of the virus was upon the human arm. I think
doi:10.1056/nejm190205291462210 fatcat:lnbqdtnaarhg3ghikyb6ganvqa