From that very paper: "The available results show that a systemic effect of oxalic acid to the beekeeper is not to be expected regarding both procedures. This is true without special preventive measures, e.g. carrying of a protective mask. *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html Guidelines for posting to BEE-L can be found at: http://honeybeeworld.com/bee-l/guidelines.htm