Copyright notice:
These images can be freely used for educational purposes but must not be used for commercial purposes without the prior consent of the Agri-Food and Biosciences Institute.
Copyright notice which must accompany any copy of these images:
Copyright 2007 Agri-Food and Biosciences Institute
Note: The images were scanned from photographic prints (10"x 8") at a resolution of 72dpi (256 levels) greyscale. A standard magnification of x250000 was used in each case."