Lists the practical problems found in the manuscript of Book III of the Algebra which were not included in the printed text. The author believes that their omission reflects the influence of Bombelli's discovery of Diophantus.

This is a first attempt at consolidating and extending the lists of biographies of historians of science compiled by George Sarton, Aldo Mieli and François Russo. In doing so, a systematic examination has been made of the Dictionary of scientific biography, and of the relevant parts of the Isis cumulative bibliography and Kenneth May's Bibliography and research manual of the history of mathematics. Material for a supplement is being collected. Readers are invited to send additional material along with their comments.

Although many historians of science have devoted a good part of their working life to the study and cataloguing of scientific manuscripts, no systematic bibliography of their work is available. The present checklist—a first attempt to prepare such a bibliography—has been compiled using P. O. Kristeller's Latin manuscript books before 1600 as a guide. Material for a supplement is being collected. Readers are invited to send their comments and suggestions.