Date: Tue Mar 17 11:20:55 2009 Back to Contents ------------------------------------------------------------------------

Author: Bill Alexander

Subject: Re: Power Lines and compasses?

Post:

If you read the comments after the story, people who are around cows seem to agree that the N-S study was bull. That agrees with my experience around here, that things like wind direction, sun position, and land slope are the factors, and on a calm day the cows are randomly scattered (unless heading for the barn).

Bill A.
who has had 3 cows and about 30 sheep (not all at once) on my Bar BQ ranch.


----- Original Message -----
From: cbettis@unlserve.unl.edu
To: tap-l@lists.ncsu.edu
Sent: Tuesday, March 17, 2009 8:06:37 AM GMT -08:00 US/Canada Pacific
Subject: Re: [tap-l] Power Lines and compasses?


Jim,

Here is a link to the story:

http://www.npr.org/templates/story/story.php?storyId=101945271


Cliff

Quoting "Papp, James J " :

> How do the cattle detect a magnetic field? How did the researchers
> measure the cattle's alignment with the Earth's magnetic field? Does the
> oscillating field of the lines register with cattle at all, as opposed
> to a basically static field from the earth? What is the strength of the
> power line field where the research took place? What is "near" to a
> power line, in meters? How much current did that line carry? Etc.
>
> Jim
>

From tap-l-owner@lists.ncsu.edu Tue Mar 17 11:20:55 2009