Introduction 



of climate in Shetland within at least fifty 

 years. 



The following observations were made in 

 Unst, the most northerly of the Shetlands, 

 hourly from 1st August 1841 to 3ist July 

 1842. The mean temperature of each month 

 is given together with the mean temperature 

 of Sandwick in Orkney, Applegarth in 

 Dumfriesshire, and Glasgow. 



The mean pressure of the atmosphere in 

 Unst is also appended, calculated at the same 

 time as the temperature. 



Mean annual pressure atmosphere in 

 Orkney 29-657. 



