While discussing hearing in bees let me remind everyone of the small ultrasonic devices marketed about 10 years ago under the name "Bee Calm". Supposedly you could turn it on and calm the meanest bees. We did a small replicated trial of the device and found it to be of no value. I bring this up to keep us from reinventing that particular wheel. As to truck vibrations when loading bees, I think they are beneficial too, but the beneficial frequencies need to be measured somehow. Bill Lord -- WILLIAM G LORD E-Mail : wglord@franklin Internet: [log in to unmask] Phone : 9194963344