Manchester Memoirs, Vol. lix. (1915)) No. 5. 



Total number of days on which Fog and Gloom prevail 

 is steadily increasing, the most marked advance is in the 

 number of days affected by gloom, the increase being 

 100%. Gloom prevails on days of very little wind, the 

 smoke cloud accumulates locally during the hours when 

 house and office fires are being lighted and before they 

 are burning brightly, the greater number of glooms occur 

 about 10-30 a.m 



As a further confirmation of the increase in the 

 smokiness of the local atmosphere, I have made some 

 comparisons of the values of sunlight at two points on 

 and about 100 feet above the ground. These show a loss 

 by various methods of about 10 %. 



A comparison of the record by the Campbell Stokes 

 sunshine recorder at the School of Technology 100 feet 

 above ground with those published for the Oldham Road 

 station of the Medical Officer of Health supports the 

 increase of obstruction to the free passage of sunlight. 



Table III. 

 Comparison of Manchester Records of Bright 



Sunshine. 





Godlee 



Oldham 







Year. 



Observatory. 



Road. 



G. O.--O. R. 



ofG. 



1906 ... 



1149 



II44 



+ 5 • 



0-4 



1907 ... 



1028 



942 



+ 86 . 



.. 84 



1908 ... 





991 



+ 171 



. 147 



1909 ... 



1148 



999 



... +149 . 



.. 130 



1910 ... 



1 106 



982 



+ 124 



11*2 



191 I ... 



1431 



1284 



... + 147 . 



• 10-3 



1912 .. 



9O5 



779 



... + 186 



l 9"3 



I913 ... 



I033 



SS 3 



... + 150 . 



• i4-5 



Here again the loss during the years 1908-9 corre- 

 sponds with the increase of fog and gloom in those years, 

 as otherwise the loss is a steadily increasing amount. 



