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Jacopo da Firenze's Tractatus Algorismi and Early Italian Abbacus Culture

how a general history can be truly general with silences or quietudes on this scale. This feature is heightened by the final chapter of the second volume, a prediction of future progress in mathematics written by Eberhard Zeidler, where applications are very prominent. A notable feature of these handsomely produced books is the illustrations: 740 in all, with 430 in colour. Quite a few of them are portraits or illustrations made up as postage stamps, of which the author has a remarkable collection. Both books are enriched by substantial bibliographies of primary and especially historical literature. The latter category includes many items written in German, a very rich source that is unknown to most Anglo-Saxon historians. Should an English edition of these books be prepared, these bibliographies would be among the many benefits provided to English-speaking readers.