( 422 ) 



Göttingeii '). As tlip most pi-nliahle i'csults tVoin the two sei'ios lio 



found: ^) 



öi = + O" Ai) 



i<W = 4- O". 7 7 

 (W — -f- 8". 7 

 Tliese \;iliies coiTOSjtond to 



A r= ~ i>".44 c — + o". 74. 



Considering these i-esult- it seems possihh' tlial we must assume 

 the existence of a |tei'iodic term in !>. \\\\\ for tiie present \N'e 

 cannot go farther and we must await the resuHs of other series of 

 observations before wc can ^ formulate more detinite conchisions. 



I will now oidy aihl liie foHowing remark. As within each year 

 the observations are fairly regularly distributed oxer the anomalistic 

 revolution, the fact that in the presejit investigation we have disre- 

 garded the corrections of the h)ngitu(le depending on i] cannot liave 

 had an appreciable infbietu'e on tlie determination of the A and <• 

 from the scpai"ate years. ( )n th<' otlier hand an apparent pei-io(Hcity 

 in the '7 may have ai-isen from it. 



The corrections of the longitude albukMl to ai-e of the form: 



(\ I -=i .V .v/;/ (ƒ/ -[- ■/) 

 where */ is a slowly xai-ying angle. The corresponding cori'ecticuis 

 that ought to l)e a])[)lied to the (hM'liuatioii> are: 

 iSiS -- 0.40 rr).s / X '^^ ■^■'" (ƒ/ -■ X) 



= 0.20 .V .v/// (2 (J f- rr -|- /) — <>.2() .. .s/„ (.t — -/) 

 i. e. partly nearly half-monthly terms, partly t(n'ins of iojig peri((d 

 which modify the \alues found foi- <i. 



From the largest term in the correction of the longitude: 

 (SI— \- 1".28 sh, {,1 -f A' — 00°) 

 arises a term : 



(S(S— — ()".2<; .-/■;/ {n — A' -f 90') 



which term has a period of 17 years. 



Astronomy. — '• Iiirestujaton >>/ tlii' o-ror.^- of thu tithles of //ir 

 nionn of Hansen — Ni<:\v('().mb In tlw iji'<irs 1895 — 1902." By 

 Dr. E. F. v.vN D'.-; Sande Bakhuliziln. (Second paper, part II j. 



(Coaiinunicated in the meeting of Xoveinber ;28, 1903.) 



19. In the preceding consideratiojis 1 had not taken into account 

 the correction which Hansen's vabie for the oblitpiily of the ecliptic 

 may need. Nor had I paid heed to the eri-ors i]i the ol>served decli- 

 nations which \ary with the (hM-Huation itself. 



1) Aslron. Nadir. Bd. \U, S 177. 



3) I adopt the mean uf the results fuand by Franz in two dillLienl ways. 



