370 Comparative View of Mean Temperature [Nov. 



Article VI. 



Comparative View of Mean Temperature at different Places in 

 Great Britain. By Dr. John Forbes. 



(To Dr. Thomson.) 



DEAR SIR, Penzance, Sepl. 12, 1820. 



In composing a paper on the Medical Topography of this 

 place, and the neighbouring district of the Land's End, in which 

 1 have lately been engaged, I was naturally led to compare the 

 temperature of Penzance with that of other places in different 

 parts of the island. The following table exhibits a few of the 

 results to which this inquiry led ; and will, I hope, appear suffi- 

 ciently interesting to you to entitle it to a place in your journal. 

 I likewise send a note of the variation of temperature observed 

 by me during the eclipse of the sun on the 7th, which, I doubt 

 not, will be satisfactory, on account of the geographical position 

 of the place of observation. 1 am, dear Sir, 



Your faithful servant, 



John Forbes. 



Note of the Variation of Temperature during the Eclipse of the 

 Sun, Sept. 7, 1820, observed at Penzance. 



Time of observation. Fahrenheit's ihermometer. 



11" 34' 65-0° 



12 30 65-0 



— 40 65-0 



— 45 65-0 



— 55 66-0 



1 — 66-0 



— 10 65-7 



— 25 65-0 



— 30 64-5 



— 40 64-2 



— 50 64-0 



2 05 64-5 



— 15 64-0 



— 25 64-5 



— 45 65-0 



— 55 65-5 



3 — 65-7 



— 30 65-0 



Temperature by Register Thermometer. 



Mux. Min. 



Sept. 6 ti4° 58° 



7 65 52 



8 G5 50 



