“…These studies have also been extended to include ceveratrum alkaloid preparations from Veratrum spp. (see for example Fisher, 1940 ;Jaretzky and Janecke, 1940;Krupp, Lendle and Stapenhorst, 1952;Seiferle, Johns and Richardson, 1942). A particularly active preparation is produced by treating sabadilla seed with lime Walton, 1945).…”