IS 14.] Scientific Intelligence. 465 



Nearly the whole of his very powerful apparatus, which has been 

 recently materially improved and extended, will be employed in 

 illustration of these lectures. 



I. Mean Temperature of different Places. 



The following table, drawn up by M. de Humboldt, is well 

 Worth the attention of meteorologists. Those cities to which an 

 asterisk is attached are singularly situated with respect to climate, 

 either by their elevation above the level of the oceaa, or by circum- 

 stances independent of the latitude : — 



If the reader compare this table with one given by Dr. Wahlen 

 berg, and published in the Annals of Philosophy, vol. iv. p. ll.*>, 

 he will find some slight differences, though not material. It would 

 be easy to add to the preceding table the mean temperature of 

 different places in Great Britain ; and from our insular situation 

 this temperature is much higher than might be expected from the 

 latitude of the places. Thus the mean temperature of Edinburgh 

 is 4/°, judging from the springs, which 1 conceive to be rather 

 below than above the truth. The latitude of Edinburgh is 

 55° 58' f>7"; yet we see its mean temperature not only exceeds 

 that of Copenhagen, but even that of Berlin, which is nearly 3{P 

 farther south. In like manner, the mean temperature of London 

 determined from the heat of the springs is 51®. Now this is only 

 one-fourth of a degree of the thermometer lower than the mean 

 temperature of Paris, though the difference of latitude be more 

 than 2£°. These examples are sufficient to show how much the 

 winter cold in Great Briiain is moderated by the insular situation j 

 for the difference in our favour falls chiefly 10 winter. In summer, 

 continental places are almost always much warmer than insula t 

 titrations in the same latitude. 



Vol. IV. N* VI. 2 Q 



