Mr. Harvey on the Formation of Mists. 



63 



The following table contains an abstract ot some results 

 recorded, at my request, by a scientific friend *, and which 

 perfectly accord wath the luminous views of Sir H Davy. 



All the preceding observations were made at 7 A.M., exceptino- 

 the first, which was at 6 A.M. 



Some instances also have occurred, to illustrate a remark 

 made by Sir H. Davy, that a current of dry air passing across 

 a river will prevent the formation of mist, even when the 

 temperature of the water is much greater than that of the at- 

 mosphere ; and he adduces an example of the Danube having 

 no mist on its surface, when the temperature of the river was 

 61°, and the air only 54°; the cause of which he attributes to 

 the prevalence of a strong easterly wind. The following are 

 some examples which occurred during the past summer : — 



These observations were also made at 7 A.M. 

 * Mr. George Pridham. 



