CONTENTS. 



Art. 1. T. Terada, M. ]\iuti and J. Tukamoto : — On diural variation of 

 barometric pressure. Publ. November 20th, 1917. 



Art. 2. Y. Shibata and T. Muraki : — Mesotomisation of diammine- 

 dinitro-oxalo-cobalt complex and determination of the configura- 

 tions of this complex and of diammine-tetranitro-cobalt complex. 

 Publ. November 30th, 1917. 



Art. 3. K. Hirayama : — Researches on the distrib ition of the mean 



motions of the asteroids. WifJi 1 plate. Publ. March 30th, 



1918. 

 Art. 4. M. Kuntieda : — Asymptotic formulae for oscillating Dirichlet's 



integrals and coefificients of power series. Publ. April 30th, 1919. 

 Art. 5. T. Terada, M. Ishimoto and M. Imamura : — On the effect of 



topography on the precipitation in Japan. Publ. June 13th, 



1919. 

 Art. 6. Y. Shibata : — Recherches sur les spectres d'absorption des 



ammine-complexes métalliques. III. Spectres d'absorption des 



sels complexes de nickel, de chrome et de cuivre. Avec 18 



figures. Publ. March 20th, 1920. 

 Art. 7. K. Yamada : — Magnetic separations of the lines of iron, nickel 



and zinc in different fields. With 20 plates. Publ. February 



28th, 1921. 

 Art. 8. Y. Takahashi :--Magnetic separations of iron lines in different 



fields. With l3 plates. Publ. February 28tb, 1921. 

 Art. 9. T. Takagi :— Ueber eine Theorie des relativ Abel'schen Zahl- 

 körpers. Publ. July 3 1st, 1920. 

 Art. 10. K. Matsuno : — On the stereochemical configuration of the 



aquotriammine and diammine cobalt complex salts. Publ. 



March 31st, 1921. 

 Art. 11. K. Matsuno : — The coagulation of arsenious sulphide sol by 



cobaltic complexes. Publ. March 31st, 1921. 



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