378 Dr BREWSTER on the Register of the Thermometer kept 



parts of Europe. To the following short Table of some of 

 these, I have added the deviations from the mean temperature, 

 as computed from the results of the preceding Tables : 



Morning. 



Edinburgh, - 8 h 

 Williamstown, 7 

 8 



Deviation from 

 Afternoon. Night. Mean Temp, of day. 



o 



Maximum. 10 h + 0.346 Professor Playfair. 

 2 9 +0.510 Professor Dewey. 



1 6 +1.225 Proposed by the Phil. 



Soc. of New York. 



As three daily observations are not convenient for many me- 

 teorologists, who are engaged in professional pursuits, it became 

 desirable to select those two hours, the mean of whose tempe- 

 ratures approached nearest to that of the whole day. The fol- 

 lowing times have been used in this country, and many of them 

 give results that differ very considerably from the mean tempe- 

 rature of the 24 hours : 



Hawkhill, 



Gordon Castle, 



Kinfauns, 



Ditto, 



Leadhills, 



Isle of Man, 



Royal Society, London, 



Royal Society, Edinburgh, 



8 

 8 

 7 

 7 

 10 



3 

 2 

 8 

 2 

 10 



84 



84 



Deviation from Mean 

 Temp, of Day. 



+ 0.982 

 + 0.982 



1.114 



0.122 



0.134 



0.838 

 + 1.453 

 + 1.526 

 + 1.511 

 + 1.273 

 + 1.258 

 + 1.01S 

 + 0.982 

 + 0.641 

 + 0.610 



0.120 



0.805 

 0-000 



