TEMPERATURES IN WOODS, GLADES, AND PLAINS. 



85 



stations, and this Dr. Hamberg', as appears from liis discussion of tlie 

 Swedish results, has endeavored to make. 



The deductions of Dr. Hambcr!:;: have been taken without change, 

 excei)t in reducing tlie units to the commou English ones. The air 

 observations were taken at a height of 1.8 meters (.~).0 feet). The series 

 of observations discusse<l for temperature are usually from three to five 

 years' duration. The mean annual results are shown in Fig. 45. lu 



Mi III Ilium. 



2farliiiinii. 



ANNUAL AIR TEMPERATURES. 

 Woods — Glade. - - - - 



* WaoTls^ Plain. . . . - 



ANNUAL SOIL TEMPERATURES. 

 Woods — Glcidp, (if 70 inrhc":. 



Weeds — Plain, 



Woods — Glade, at 5 feet. 



Woods — Plain, ." " 



Scale. 



Flfi. 45.— Dift'erenocs id' iiicaii annual temperature between wnod.s and glades and woods and iilaiiis, 



Swedish observations. 



the air temperatures the maxima are higher in the woods as compared 

 with the glades and as compared A\'ith the plains. They are, therefore, 

 erected above the zero line. The maxima arc reduced in botli cases, 

 and they are let fall below that line. It appears at ouce that the meau 

 range is larger (the total line longer) for the reduction by wood as com- 

 pared with plain. 1 f the <'om])arisou of woods with glade be ^V— G, and 

 wood with plain H— /*, then the following exhibits the dilferences: 



I'l tHjiiritliiri (li()'rrrinrs in irouil.'i, i/liulis, diitl i)liiiii.'<. 



Maxima 

 Minima. 

 Mean . . . 

 Kange . . 



