METEOROLOGICAL REPORT. 175 



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METEOROLOGICAL REPORT. 



The cold foggy weather, the latter end of December, furnished me with 

 an extraordinary and curious fact — not altogether new, as it is noticed parti- 

 cularly in White's Natural History of Selhournc, — still extraordinary, as 

 shewing in how short a distance great differences of temperature may be 

 found. I shall here merely transcribe the remarks entered in my Journal : 



" Dec. 24 — The fog very dense below, the top of it just reaching up to the 

 village, sometimes enveloping us, and then again receding. The trees here have 

 but very little hoar frost upon them — those just above have none at all — whilst 

 all beloiv is white as snow. Last evening, the air here clear and transparent, 

 and the thermometer 31. ; down below the fog was thick, and I find the ther- 

 mometer at the same hour stood at 20. When the fog reaches this place, 

 the thermometer falls, and it is now, (5 p. m.), just in the fog, 20** ; whereas 

 a thermometer which I took with me about 100 yards up the hill, out of the 

 fog, HOSE to 30." 



" 27, 10 a. m. — Fine, sun, and light southerly breeze, and really feels 

 mild — thermometer 32 : not 50 yards below, it is foggy, and every thing 

 beautifully crusted with hoar, and the same thermometer falls to 18**!" I 

 carried the thermometer myself, and ascertained the fact by two or three 

 ' trials. " The distance traversed to obtain these temperatures is certainly 

 not more than 50 or 60 yards. The higher locality, (mt of the fog, being 14* 

 warmer than the lower in it?'* 



This fog, then, had a really specific temperature, and that a very low one. 

 In those elevated spots, out of it, the temperature was by no means low — 

 on the contrary, H** warmer. W. A. 



Great Malvern. 



