2 Jenkins, Note on Foggy Days in Manchester. 



ness prevailed with clear horizontal vision, caused by 

 the suspension of smoke at a very low altitude, these I 

 call Gloom days. 



In Table I. the monthly averages are given in column 

 2 for fog only, column 3 gloom only, column 4 fog and 

 gloom combined, column 5 gives the combined figures for 

 the years 1904-7, and in column 6 for 1910-13. 



In this way we are able to see at a glance the 

 increased numbers in the period 1910-13 as compared 

 with the years 1904-7, the average being 30% increase. 



Making a diagram of these it is evident that the 

 position of the heavy continuous line representing the 

 figures for the years 1910-13 is above the average, and the 

 opposite in 1904-7 except for the months of November 

 and December. 



This brings me to a re-arrangement of the figures 



Table II. 



Annual and Seasonal Distribution of Foggy 

 and Gloomy Days. 



Year. 



Total 

 Foggy. 



Animal. 

 Gloomy. 



Oct. 

 Foggy 



lo March. 

 Gloomy. 



Apl. 

 1' oggy. 



to Sept. 

 Gloomy 



1904 .. 



• 34 • 



JO 



• 3o 



8 ... 



4 



2 



1905 .. 



24 . 



7 • 



. 24 



... 5 ... 



— 



2 



1906 .. 



26 . 



5 



• 24 



5 



2 



.. — 



1907 .. 



35 • 



6 .. 



. 28 



2 



7 



4 



I 908 . . 



42 . 



8 .. 



• 35 



3 



7 



5 



1909 ... 



58 • 



.. 16 .. 



. 44 



10 



14 



6 



1910 ... 



42 . 



.. 15 .. 



• 27 



6 ... 



'5 • 



9 



1911 



32 



11 



. 26 



7 



6 . 



4 



1 9 1 2 



37 • 



11 



• 30 



9 ... 



7 • 



2 



1913 ... 



48 . 



.. 25 .. 



• 32 



8 ... 



16 . 



17 



according to season. In Table II. is given the Annual 

 and Seasonal Distribution of Fo£<>v and Gloomv Daws 

 From this table it is quite apparent that the Annual 



