Inside this Stevenson screen are: mercury thermometer, 7-day
recording thermograph, and 7-day recording hygrograph (relative humidity
measurement - and yes, it uses specially treated human hair as an accurate
humidity device). I had to build the weather box myself as the factory
ones were way too expensive for what they are - a double ceiling ventilated
box. I also have a sling psychrometer for super accurate relative
humidity. More pictures later...