THE ROBINSON ANEMOMETER 



The revolving hemispherical cups are being held still for the photo- 

 graph to be taken. The wind-speed is measured by the rate of rota- 

 tion of the cups. Below the cups are the vane-wheels which, acted 

 upon by the wind, record the wind-direction by suitable gearing. 

 The small instrument low down on the right is a Campbell -Stokes 

 Sunshine-recorder. 



PHOTOGRAPH COPY OF A SUNSHINE RECORD 



The dark line shows the charring of the card by the heat of the sun's rays. When the sun is shining strongly the 

 card is charred right through, as shown in the illustration. The vertical white lines are hour-lines, and it will be noticed 

 from the horizontal white line that the sun was shining continuously from 10.30 a.m. till about noon, while between noon 

 and i p.m. the sunshine was rather intermittent. 



