18 



Art. 5. — T. Terada, M. Isimoto and M. Imamura : 



will assume provisionally that R2=Bz=R' Putting it for i?,, the 

 above expressions (A) assume the following forms: 



r^—It +Ci, r.2 = B — aci, 



r^=B' + c„ r\=B'-ac., (B) 



r5=B' + c^, r^=B' — ac^, 



from which we may determine the values of R, R\ a, Ci, d and c^: 



Cs 



(C) 



1 + rt 



The results of calculation are siven in Table IX. and Fig. 4. 



Tap.le IX. 



It may be remarked that a comes out generally positive, 

 except in June. It is generally less than unit}^ in the colder 

 season and greater than unity in warmer nfbnths. Each of Ci, c., C3, 



