Slide showing a diagram concerning drosophila melanogaster? Slide shows a diagram concerning drosophila melanogaster? Four flies can be seen on the left of the slide. These are then linked to other images. No information provided. Small white label in the upper left corner of slide reads: 'Newton & Co, 43 Museum St, London, W.C.1..' Newton & Co were manufacturers of lantern slides and had various branches in London. Late 19th to early 20th century