Probably the cows respond to ground current Ground current creates a voltage gradient in the ground and cows feel this gradient between their feet. Lining up their feet with the equipotential lines in the soil could caused by this effect !
http://www.omafra.gov.on.ca/english/livestock/dairy/facts/strayvol.htm Regards, Ing. Gert Gremmen [email protected] www.cetest.nl Kiotoweg 363 3047 BG Rotterdam T 31(0)104152426 F 31(0)104154953 Before printing, think about the environment. Van: [email protected] [mailto:[email protected]] Namens John Woodgate Verzonden: Tuesday, March 17, 2009 8:20 AM Aan: [email protected] Onderwerp: Re: Interesting Article In message <E5F4E8082CEA4C829543E078601D4F0D@your43b791e201>, dated Mon, 16 Mar 2009, John Shinn <[email protected]> writes: >Interesting article on magnetic fields. It should perhaps have been published about 16 days later. After all, the HV power lines carry 3-phase AC, and there is very nearly no component of the magnetic field in the direction of the line. One would expect the animals to line up in a direction perpendicular to the line, and reverse their headings every cycle. I am reminded of a very old 'research report' that claimed that homing pigeons were disoriented by MF radio antenna masts and circled round them. It was proposed in response to change the polarization to horizontal, thus inducing the pigeons to make vertical circles, half of which would be below the ground surface. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Things can always get better. But that's not the only option. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]> - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
