Supporting data, regarding 'The crystallography of the biscyclic dibenzacridines I. The electron distribution in 1.2:8.9-dibenzacridine' by Ronald Mason A table, labelled table 4, showing observed and calculated structure factor amplitudes for 1.2:8.9 dibenzacridine. Annotations in ink throughout. Subject: Chemistry / Crystallography The affiliated paper was published in volume 258 of the Proceedings of the Royal Society A as 'The crystallography of the biscyclic dibenzacridines I. The electron distribution in 1.2:8.9-dibenzacridine'. [1960]