﻿THE AIR OF TOWNS. 



41 



APPENDIX II. 



I have registered by a well-knowu method " the total daylight on a spot on Wood- 

 house Moor (a high open moor lying to the northwest of the town) nearly every day 

 during the months November, 1895, to February, 1896. The same has been done at 

 the Philosophical Hall (near the center of the town) and at Kirkstall Road t (a busy 

 manufacturing center). In the latter j)lace the smoke absorbs about one-quarter of 

 the total daylight. The following are the results obtained. To economize space the 

 results for each week are added together : 



Light tests. 

 A comparison of tlie total daylight in different parts of Leeds. 



Tear] 895-96. 



Woodhouse 

 Moor. 



Philosophical 

 Hall. 



Kirkstall 

 Koad. 



July 1-7 



July 8 14 



Not recorded. 



Not recorded. 



Not recorded. 



Not recorded. 



22.94 



15.92 



10.20 



10.90 



18.30 



4.50 



2.60 



4.65 



7.88 



8.17 



13. 66 



6.56 



8.28 



3.82 



78.30 



88.30 



81.70 



65.30 



Not recorded. 



Not recorded. 



Not recorded. 



Not recorded. 



Not recorded. 



a 4. 80 



1.99 



2.32 



5.60 



5.90 



9.02 



a 7. 20 



a 9. 05 



a 4. 40 





83.60 



60.60 



58.50 



20.61 



12.25 



6.10 



10.34 



7.17 



3.53 



1.53 



2.51 



5.51 



5.47 



8.04 



a 7. 58 



a 10. .57 



3.26 



July 15 21 



July 22 28 



Nov. 10 16 



Nov. 17 23 



Nov. 24-30 



Dec. 1-7 



Dec. 8 14 



Dec. 15-21 



Dec. 29-Jan. 4 



Jan. 5-11 



Jan. 12-18 



Jan. 19 2 5 



Jan. 26-Feb. 1 



Feb. 2-8 



Pel). 9 15 



Feb. 16-22 



a The six numbers marked with an asterisk are exceptions to the general rule. For some unex- 

 plained reason, the amount of light registered on these dates is greater in the smokier parts of the 

 town than on the open moor. 



* The method used was to estimate the amount of iodine liberated on exposure 

 from a mixture of potassium oxide and sulphuric acid. The numbers represent 

 cubic centimeters of thiosulphate solution used. 



t The position would be a little to the left of the center of the view shown in the 

 photograph of Leeds. 



231A- 



