The goal of this study was to examine whether and to what extent sex ratio values at birth may have reflected social and economic inequalities in the Province of Poznań (German: Provinz Posen) in the last decades of the 1800s and early 1900s. It was assumed that maternal economic, social and emotional well-being differed according to the size of the place of residence (Poznań / town / village) and AbstraktCelem pracy było sprawdzenie, czy i w jakim stopniu wskaźnik proporcji płci przy urodzeniu mógł odzwierciedlać nierówności społeczne i ekonomiczne w prowincji poznańskiej w ostatnich dekadach XIX i na początku XX wieku. W pracy założono, że ekonomiczny, społeczny i emocjonalny dobrostan matki różnił się ze względu na wielkość ośrodka zamieszkania (Poznań / miasteczko / wieś) i stan

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An increase in the activity of peroxidases under the influence of kinetin has been demonstrated in the protonema of the moss <i>Ceratodon purpureus</i>. It was connected above all with initiation and acceleration of the differentiation process of gametophore buds which showed a high activity of these enzymes. The increase in peroxidase activity was also noted in the degenerating intercalary cells which produced the buds. The colour reaction characteristic for peroxidases was best noticeable in the minute spherical granules (peroxysomes), nucleoli and cell walls.