5. Temperatures at Different Heights above Ground at Ben Nevis Observatory

Extract

During part of the recent summer (1886), in addition to the ordinary temperature observations here, a set of readings were taken in a Stevenson screen, at a height of 112 inches above ground—that is, at about two and a half times the standard elevation of 48 inches. The high level screen was mounted at the top of a stand used to carry the thermometers in winter, and consisting of two stout upright posts or battens, with cross bars between them at every 2 feet or so; the screen is placed with the lower edge of the back resting on one bar, and is tied to the one above it or to the side posts. The screen used on this stand is smaller than the standard Stevenson screen, but it is constructed in exactly the same manner, with double louvred sides and the bottom open. It measures inside 10 inches broad by 6 inches deep and 15 inches high.