21 



1908. Preliminary note on a new element allied to molybdenum. XXV., 

 Art. 16, 1-13. 



OGAWA, Masataka, and DIVEKS, Edward. 



1899. Ethyl ammoniumsulpliite. XL, 197-204. 



1900. Ammonium amidosulpliite. XIU., 187-199. 



1900. Products of heating ammonium sulphites, thiosulphate, and trithionate 



XIII., 201-209. 



1901. Ammonium and other imidosulphites. XVII., Art. 1, 1-7. 



1902. Preparation of sulphamide from ammonium amidosulphites. XVII., 



Art. 8, 1-6. 



OKA, Asajiro, 



1891. Observations on fresh-water Polyzoa. IV., 89-150. 



1895. On some new Japanese land leeches {Orobdella nov. gen.). VIII., 



275-306. 

 1895. On the so-called excretory organ of fresh-water Polyzoa. VIII., 339- 



366. 



ÖKUBO, Samuro. 



1887. On the plants of Sulphur Island. II., 113-117. 



OMORI, F[usakichi]. 



1894. On the after-shocks of earthquakes. VII., 111-200. 



1899. Horizontal pendulums for the mechanical registration of seismic and 



other earth movements. XL, 121-145. 

 1899. Note on the preliminary tremor of earthquake motion. XL, 



147-159. 

 1899. Notes on the Earthquake Investigation Committee catalogue of 



Japanese earthquakes. IL, 339-437. 



OMOKI, F[usakichi], and HIPtATA, K[an]. 



1899. Earthquake measurement at Miyako. XL, 161-195. 



