A Ma,ö"nfitif; Siirvev of all Ja.Da.n 



Errata. 



Pa^e 170, lltli line from bottom, f.jr " 2()(h " read " 22ud " 

 „ 186, 8rh ,, ,, l)ottom, ,, "in" „ "is." 



Specimen Page opposite page 190, line marked (12), for 

 " Log. V3//H" read " Log. V17 H." 



I^ige U)2, lOili line from t<jp, for " YalirI)Li(-h" read '• Jalirl>iirli." 

 ,, 216. 13ih ,, ,, ,, f )r " Spicn " rend " Arctni-us." 



i.uai gi;iiLiriii;iii ifit iii;^ uu ii < Mj."^L-r\ ;ii luii.-^ an mo tiiiduccu, Mioniif WUIl 



a fidl account of his in.sti-uments and modes of operation. This 

 account is reproduced, very much in his own words, in Section III of 

 the present paper. That Section, therefore, is ]iooidiar]y 'Mv. Tanaka- 

 date's contribution. For tlie rest — the combininu' of the observations 

 hy the method of Least Squares, the preparing of tlie Charts, etc. — 



