11. On, the " longest " photographic negative was measured wide. 12. The museum also boasts photographic archives containing over 200, 000 photographic negatives and color transparencies. 13. The dry atmosphere and mild temperatures of Harbin aided the preservation of the photographic negatives . 14. The actual size of the image is the same size as a 35mm photographic negative . 15. The Ashmolean Museum in Oxford received the photographic negatives . 16. White aspens make black shadows, a photographic negative . 17. The process used a chemical process to transfer a photographic negative to a rubber surface before printing. 18. On the right of the page, draw a vertical line representing the photographic negative inside the camera. 19. Nose grease can be used to minimize scratches in optical surfaces, for example when cleaning photographic negatives . 20. Night scenes look like photographic negatives ; the more heat an object gives off, the whiter it appears.