P.M.S. Blackett; G.P.S. Occhialini (1933). Some Photographs of the Tracks of Penetrating Radiation. Proc. R. Soc. Lond. A139 (839): 699-726. DOI: 10.1098/rspa.1933.0048.
P.M.S. Blackett (1952). A Negative Experiment Relating to Magnetism and the Earth's Rotation. Proc. R. Soc. Lond. A245 (897): 309-370. DOI: 10.1098/rsta.1952.0024.
P.M.S. Blackett (1961). Comparison of Ancient Climates with the Ancient Latitudes Deduced from Rock Magnetic Measurements. Proc. R. Soc. Lond. A273 (1312): 1-30. DOI: 10.1098/rspa.1961.0140.