Summary: The Wairarapa Valley hypersthene-olivine chondrite, found about 1863, has been analysed with the following result: SiO₂ 35·72, TiO₂ 0·11, Al₂O₃ 2·91, Cr₂O₃ 0·48, FeO 12·42, MnO 0·28, MgO 23·28, CaO 1·73, Na₂O 0·96, K₂O 0·20, P₂O₅ 0·31, Fe 12·61, Ni 1·50, Co 0·04, FeS 5·46, Cl 0·07, H₂O⁺ 1·05, H₂O⁻ 0·48, less O for Cl 0·03; total 99·58 %. D. 3·65. The phases present are kamacite, taenite, plessite, troilite, magnetite, chromite, olivine Fa₁₆, bronzite Fs₁₅, possibly enstatite, plagioclase An₂₅, and (?) maskelynite An₉. The structures of the silicate phases and those disclosed by etching the metal phase are illustrated and described.