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IN order to be able to discriminate with certainty between butter and such margarine as is sold in England, it is necessary to carry out two or three elaborate and delicate chemical processes. But there has always been a craving by the public for some simple method of determining the genuineness of butter by means of which the necessary trouble could be dispensed with. It has been suggested that such easy detection would be possible if all margarine bought and sold in England were to be manufactured with some distinctive colouring added—light‐blue, for instance—or were to contain a small amount of phenolphthalein, so that the addition of a drop of a solution of caustic potash to a suspected sample would cause it to become pink if it were margarine, while nothing would occur if it were genuine butter. These methods, which have been put forward seriously, will be found on consideration to be unnecessary, and, indeed, absurd.

In 1899 the medical practitioners of Dublin were confronted with an outbreak of a peculiar and obscure illness, characterised by symptoms which were very unusual. For want of a better explanation, the disorder, which seemed to be epidemic, was explained by the simple expedient of finding a name for it. It was labelled as “beri‐beri,” a tropical disease with very much the same clinical and pathological features as those observed at Dublin. Papers were read before certain societies, and then as the cases gradually diminished in number, the subject lost interest and was dropped.

Aarhus Kommunes Biblioteker (Teknisk Bibliotek), Ingerslevs Plads 7, Aarhus, Denmark. Representative: V. NEDERGAARD PEDERSEN (Librarian).

Career Development International (CDI) is an established source of scientific research on careers and development. The journal reached its 25-years milestone in 2021. To commemorate the occasion, the article aims to provide a retrospective of the major trends, research constituents, thematic structure and key factors explaining the citation impact of CDI articles between 1996 and 2020.

The article extracts bibliographic data of CDI from Scopus and uses that data in (1) a series of bibliometric analyses to explain the major trends, research constituents and thematic structure and (2) a negative binomial regression analysis to explain the key factors affecting the citation impact of CDI.

The article finds that CDI has progressed and contributed substantially to the scientific community since its inception 25 years ago. The contributions in CDI are mainly from America and Europe and can be organized around five major clusters, namely career development, work engagement, entrepreneurship career, career outcomes and career mentoring.

The article provides a rich overview of CDI, but the findings are limited to the accuracy and availability of bibliographic data of CDI from Scopus.

The article extends Akkermans and Kubasch's (2017) 5-years retrospection of major journals on career and development through a 25-years retrospection of CDI, and in doing so, the article provides a longer and more accurate representation of CDI's contributions to the extant literature on career and development.