Slide showing 'diagrammatic representation of nuclear division in a species with four similar chromosomes'. Slide shows a 'diagrammatic representation of nuclear division in a species with four similar chromosomes'. There are ten diagrams, numbered 1 to 10. Diagrams 1 to 6 consist of single cells, whereas 7 to 10 consist of two cells. Each cell shows the division of the nucleus. Title below image reads: 'Fig 60 - diagrammatic representation of nuclear division in a species with four similar chromosomes'. Late 19th to early 20th century