Solution of a Problem in physical Astronomy. 95 



of Dodson's Calculator, gives - - 250949 = a. 

 a 0-39959 



\cc F'99^38 



Sum of these two logarithms 2-39597 0-02489 = face =b 

 4fc 2-218 



3-5 „„4. 



Sum of these two logarithms 4-6 1 4 0-00041 = g — ac* = c 



The sum of these three terms is - 2:53479 = S; to which 



add the sum of the four terms above found 75-81 761 , and we have 



78-35240 = all the terms. 

 1-8940,583 



7r (a -f- by 1-2060,282 



The difF. of these two lop;a- 1 ~ 00 A 



. & 10-6880,241 4-87555 = A. 



nthms is - - J 



13. We are next to compute the value of B; which compu- 

 tation will be much facilitated by the use of numbers already 

 found in the computation of the value of A. The arithmetical 

 work may stand as follows. 



