their holdings of multiple copies. A handful of later lists are included, the most substantial from the seventeenth century being that of John Nidd, dated 1659, with a high proportion of medical books. Where the books were bequeathed to College libraries, as Nidd's were to Trinity and Andrew Perne's to Peterhouse, those still to be found on the College shelves have been identified. The owners f...

This article gives a short and personal portrait of Ernst Hadorn (1902-1976), one of the most influential developmental biologists in Europe. Hadorn initially worked with amphibia, but then soon turned to Drosophila where he very successfully studied lethal factors and the development of imaginal disks.