An appreciation of the book by Jacques André is published in La Lettre Gutenberg (number 29), with some lamentations about how such a work could not possibly be published in France. He concludes: ‘Ce qui est très rare sur ce sujet et qui sera donc la référence désormais. Livre indispensable donc …’ André expresses a wish for Burnhill’s research to be extended. In fact this is happening just now in Leipzig, where Fred Smeijers is, with his students, testing the theory of a unified system of measurement. We hope to publish the results in due course.