ISOCHIMENAL TEMPERATURES. 501 
valley ot the Allen, at an elevation of 1860 feet above the level 
of the sea, and the other was placed at Bywell, a village between 
Hexham and Newcastle, at an elevation of 50 feet. The two 
stations are only fifteen miles apart, but the difference in level 
between them, it will be perceived, is 1310 feet. At each place, 
during the critical months of December and January, the daily 
temperatures were carefully registered,—with what result the fol- 
lowing Tables will show :— 





BYWELL. | ALLENHEADS. Ditierence 
Max. Min. Mean. Max. Min. Mean. eee 
Dees 1 44 36 40 36 293825 79 
we 44 36 40 BONY .27 He oles 3°5 
ee) 47 37 = 42 ANE ad VES 8 
» 4 47 40 43°5 43 382 37°5 6 
Bs | 48%! 498 45 ADL’ 330) 37%, 75 
mae | 480841 * 445" | 3g "8 3109345 10 
Wen7 | 4985 8738 438% hb gg o7 Ch g0% 10°5 
3, 8 50 388 = 44 44, 2336 8 
aro 51 41 46 43 380 365 9°5 
» 10 | 50 89 445 84 24 29 15-5 
nye ual 438 40 41:5 35 23 = 29 12°5 
aoe) 50S 49°5 46 4l 30 «3555 10°5 
ae 50 44 «47 39 382 335°5 115 
» 14 50 4500 47°5 47 36 41:5 6 
yo bees 50RS Db! 48 37 42°5 35 
», 16 58 41 AZ 48 29 385 8°5 
aay | 4400410" 495 865 2895 32 10°5 
» 18 | 44 85 395 36. 25 = 30°5 9 
7» 19 40 36 38 oi Zed ll 
0 42 34 38 88 25 815 65 
iy) iL 42 87 389°5 39-28 835 6 
22 | 50 45 47-5 49 38 43:5 4 
» 20 51] 389 45 51 8682 = 41°5 3°5 
yy, 24 45 42 48°5 39 «381 385 3'o 
» 2 | 46 46 46 AN B30. 39 7 
», 26 45 39 42 39 3800 845 7 
bape, 42 336 39 34 25 _29°5 9°5 
ee8 40 382 36 30.) AO neG 10 
ay, ee 42 32 37 30) 20 ee 75 
ey) 47 42 44e5 43 36 39°5 5 
Dol AT 45 46 42 35 385 795 

Potaleis es (OV6S 
