At first I thought this funny looking container might be a paper towel dispenser or light box. I even entertained notions of some fancy bat house (yes, I know; that would make no sense.) Turns out, it's holding a high-tech digital thermometer. There's an identical unit outside in the gardens.
The thermometers are capturing the temps inside and outside the high tunnel, taking readings several times a day. Later, Bill will connect the thermometers to a computer graphing program so we can see exactly how much weather protection our little "greenhouse" is affording us.