( •'^S? ) 



to add a foiirtli Um-iii to tlio (M|ualioii {'A), vi/,, one (hat coiitaiiKMl (lie 

 factor s/t> — ,1/. Indepeiideiit ol' this, I had arrived at tlie same 

 ('Oiielusiou ill tlie cah'idation ol' (he (•alil)ra(i()ii .1. Tliereldre 1 pul : 



d — a ^ cos -^ 4- a , rOK -j j- a , cos \- h\ sin — , . . (5) 



SO that we liad to add to the second member of (2) : 



5jr p -|- 7 



i 2/ . ojr 5jr j 

 -(- //, ( si /I m -\- /\ cos ni sin 



^ ^ |5jr 2/ ^ 2/ ( / 2 



and to the second mend)er of (3) : 



. (2/,) 



ojr 



d- //, ().24 — 0.20 h sin M. 



/ 



I'M.) 



To tlie equations of table III we had (o add the terms (-(unbined 

 in table IIIA, to those ot' table IV to the tirst members the terms 

 ,iji;iven in table 1\'A, and also the fourth (Mjua(i(ui ii,iven (heiHi. 'I'hesc 

 e(j nations gave : 



</, = — 0.00915 



(^) 



a\ =r 0.000790 



a\ — — 0.00402 



h\ — — 0.001048 ' 



I>v means of these we ha\ e dei'ived fi-om the e(|uation (3) with 



(he supplementary term (.'Vd the values foi' L foi- (he di(i'ei'en( xalues 



of J/. 'l\\o resuKs ai'e given in (able ^' under the heading A.,, \\hilt> 



column L,, shows the observed xalues, and the last colunni contains 



T A H L E \ . 



