442 The National Physical Laboratory. 



Table VII. — Hourly Means of the Inclination, calculated from tlie Horizontal 



Hours 



Preceding 



Mid. 



1. 



2. 



3. 



4. 



5. 



6. 



7. 



8. 



9. 



in 

 10. 



11. 





noon. 





























67° + 







Winter. 













1900. 





























Months. 







/ 























Jan. . . . 



13-5 



13-1 



13-2 



13-1 



13-1 



130 



12-9 



12 '8 



12 -7 



12 9 



13 -2 



13'6 



13-6 



Feb 



13'3 



12-8 



12-7 



12 7 



12-6 



12-6 



12-5 



12-4 



12 5 



12-6 



12 -8 



13-0 



13 -J 



March . . 



13 4 



12-9 



12-9 



12 -9 



12 -9 



12-9 



12-8 



13-0 



13-0 



132 



13-7 



14-0 



14-1 



Oct .... 



12-2 



11-2 



11 -3 



11 -2 



11 2 



11-1 



JO -9 



10-9 



ll'l 



11-5 



12-2 



12 5 



12-5 



Noy 



10-8 



10-6 



10-5 



10-6 



10-5 



10-5 



10-5 



10-5 



10-6 



10-8 



11-1 



11-2 



11-1 



Dec 



10-1 



lO'O 



10 -o 



10-0 



io-o 



io-o 



io-o 



io-o 



9-9 



9-9 



9-9 



9'8 



10-0 



Means . . 



122 



11-8 



11-8 



11-8 



11-7 



11-7 



11 -6 



11-6 



11 -6 



11-8 



12-1 



12-4 



12-4 



Summer. 































April . . . 



13 6 



12-7 



12-7 



12'7 



12-7 



12-6 



12 -7 



127 



126 



12-9 



13 3 



13-8 



13-7 



May. . . . 



13 -4 



12-5 



12-5 



12 -7 



12-6 



12-7 



12 -9 



13 2 



13 -4 



13-6 



13-7 



13-3 



13-1 



June . . . 



11-9 



11-4 



11-4 



11-5 



11-5 



11-4 



11 ;4 



11-7 



12-0 



12 3 



12 7 



13 -0 



12-9 



J uly 



11-7 



10-7 



11 -o 



11-0 



11-1 



11-1 



11-1 



11 -3 



11-6 



119 



12-3 



12 -4 



12-1 



Aug. ... 



10-8 



10 -2 



10-2 



10-3 



10 -2 



10'4 



10-5 



10 7 



11 -1 



11 -6 



11-8 



11 -5 



11-0 



Sept 



11-6 



11*2 



11-3 



11-4 



11-4 



11-4 



11 -5 



11-7 



12-0 



12-3 



12-6 



12-6 



12-3 



Means . . 



12 -2 



11-5 



11-5 



11 -6 



11-6 



11-6 



11-7 



11-9 



12-1 



12-4 



12-7 



12 -8 



12-5 



Table VIII.— Diurnal Inequality of the 



] 



Hours 



Mid. 



*■ 



2 



3. 



4. 



5. 



6. 



7. 



8. 



9. 



10. 



11. 





Summer Means. 





-0-3 



-0-2 



-o-i 



-0-2 



/ 



-o-i 



-o-i 



+ 0-1 



+ 0-4 



+ 0-7 



+ 1-0 



+ 1-0 



+ 0-8 



Winter Means. 





o-o 



-o-i 



o-o 



-o-i 



-o-i 



-0-2 



-0-2 



-0-2 



o-o 



+ 0-3 



+ 0-5 



+ 0'6 



Annual Means. 





-0-2 



-o-i 



/ 



-o-i 



-o-i 



-o-i 



-o-i 



o-o 



+o-i 



+ 0-4 



+ 0-7 



+ 0-8 



+ 0-7 



Note. — When the sign is + 



