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GRANT et al.1–3 have reported that latent fingerprints on paper may be detected by autoradiography of the paper after it has been treated with 35SO2. Work carried out at the Health Physics and Medical Division, AERE, Harwell, has shown that a modified version of the technique of Grant et al. can be used to detect latent fingerprints on a wide range of papers. I have also found that the modified technique can be used to visualize latent fingerprints on finely woven fabrics.

THE analysis of the protein composition of blood serum or plasma by means of zone electrophoresis on filter paper has stimulated interest in clinical laboratories throughout the world. In addition to numerous publications dealing with the applications of the technique in various pathological conditions, critical assessments of its validity and accuracy have appeared1–4, in which attention is properly directed to the limitations of the method from the point of view of the numerical evaluation of the separated protein fractions. It has seemed desirable to undertake a study of the accuracy and reproducibility of this method of protein analysis, using two of the most commonly employed protein-dyeing techniques.