554 Mr. A. II. McLeod on 



Dropping these terms therefore makes an error o£ less than 

 1 part in 5500 in all cases considered ; which affects the value 

 o£ /\(f)i by less than a fraction of a second. 



The integral (23) does not converge when ^ = oo, but, as 

 has been shown, it determines /\<pi to the nearest second for 

 all zenith distances, when A;< S km. 



00- 



90° 



(Ret 



h^ =1 km. 

 11' 3" 



Table 

 raction 



*2 = 



15' 



10 



7 



4 



3 

 o 



1 

 1 



II. 



s, A </>,•) 



2 km. h 3 = 3 km. 

 20'' 18' 26" 



28 13 24 



29 10 2 



30 6 20 

 9 4 30 



24 3 28 



56 2 48 



23 2 1 



58 1 25 



39 56 



28 41 



18 26 



12 18 



9 13 



4 5 







7i i = i km. 

 20' 52" 



89 30' .. 



89 



88 



6 34 



4 18 



2 25 



15 44 



12 9 



7 56 



87 



1 39 



ft 43 



86 



1 15 



4 26 



85 



1 



3 36 



83 



43 



2 36 



80 

 75 



30 



20 



1 50 

 1 13 



70 



15 



54 



60 



9 



34 



50 



6 



23 



40 

 20 



5 



2 



16 



7 





















4>o- 

 90° 



h. = 5 km. 

 22' 53" 



K= 



24' 



19 



15 



10 



7 



6 



5 



3 



2 



1 



1 



6 km. 

 34" 

 20 

 29 

 35 

 49 



8 



1 

 39 

 34 

 42 

 16 

 48 

 33 

 23 

 10 







h 7 =7 km. 

 26' 0" 

 20 44 

 16 48 

 11 41 



5 43 



6 52 

 5 38 

 4 7 

 2 54 

 1 56 

 1 25 



54 

 37 

 26 

 11 

 



h s =8 km. 



27' 13" 



89 30' .. 

 89 



17 41 



13 57 



21 56 

 17 56 



88 



9 20 



12 39 



87 

 86 



6 49 



5 19 



9 31 

 7 32 



85 



4 20 



6 12 



83 



3 9 



4 32 



80 



2 13 



3 12 



75 



1 28 



2 8 



70 



1 5 



1 34 



60 



41 



1 



50 



28 



41 



40 



20 



29 



20 



9 



13 















