22 Dr. E, Frmldand [Feb. 10, 



Shade Temperatures at Noon and different Altitudes. 



station. 



Height above Sea. 



Oatlands Park .. 



Riffelberg 



Hornli 



Gornergrat 



Whitby 



Aak, Eomsdal . . 



Pontresiua 



Bernina Hospitz 

 Diavolezza 



Bellagio 



Shiahora 



Schwarzborn 



feet. 



150 



8,428 



9,491 



10,289 



60 



20 

 5,915 

 7,644 

 9,767 



700 



8,924 



10,338 



Sun's Altitude. 



60 

 60 

 61 

 61 



50 

 49 

 49 

 51 

 50 



47 

 46 

 46 



Temperature. 



°C. 

 30-0 

 24-5 

 20-1 

 14-2 



32' 

 36 

 26 

 19 



6-0 



28-5 

 23-0 

 20-5 



Hence it follows that the difference of solar intensity between 

 noon and sunrise and sunset respectively is less at great than at small 

 elevations, a deduction which is substantiated by the experimental 

 data contained in the following table : — 



Variation of Solar Intensity at Different Hours. 



station. 



Isle of Wight 



55 



55 

 >5 



55 

 55 

 55 

 5> 



At Sea 



Eiffelberg (8428 ft.) 



Gornergrat (10,289 ft.) 



Time. 



Solar 

 Intensity. 



Noon 

 3.30 p.m. 



Noon 

 3.15 p.m. 



Noon 



50 P.M. 



30 a.m. 



Noon 



,20 a.m. 



Noon 



55 



3 P.M. 



Difference. 



°C. 

 7-6 



8-5 



8-4 



7-9 



4-6 



5-3 



Similar testimony is also afforded by a comparison of early and 

 late observations at widely different altitudes : — 



Variation of Solar Intensity at Different Altitides. 



