Sample Our Collection

2001.153.1

The Campbell-Stokes Heliograph sunshine recorder from Tiree Met Station.

The Campbell-Stokes sunshine recorder

Courtesy of Mr Ray Sharp

The Campbell-Stokes sunshine recorder was invented in 1853 by John Francis Campbell, the editor of ‘Popular Tales of the West Highlands’, and modified by Sir George Gabriel Stokes in 1879. It consists of a glass sphere, about ten centimetres in diameter, mounted on a metal stand.

Manufactured to Met Office specification, the glass sphere focuses the rays of the sun to an intense spot which chars a mark on a curved graduated card mounted concentrically with the sphere. As the earth rotates, the position of the spot moves across the card. The card is held in place by grooves, of which there are three overlapping sets, to allow for the height of the sun during different seasons of the year.

Its main advantage is its simplicity and ease of use. However, the results require interpretation by an observer and may differ from one person to another.

Tiree in 100 Objects – 26 – Heliograph

The History of Tiree in 100 Objects

2001.177.1

Black and orange striped drugget.

Black and orange striped drugget (232 x 84 mm) with blue cotton tasselled fringe, made from Tiree wool and woven in Tiree, found in Salum House in the late 19th or early 20th century.

drugget.jpg

2001.141.1

Box of draughtsman`s compasses.

Wooden box (220 x 157 x 58 mm) with small brass plaque on lid with `A M 1939` containing a set of draughtsman`s compasses, made by Aston & Mander of London. Thought to be an instrument set used by the Met Office during WWII.

2001.1.8

Tiree Association badge.

Tiree Association badge, gold-coloured metal and gold-coloured metal with Tiree crest and motto `Tir an eorna, Tir mo chridhe`/ Land of corn, Land of my heart.