Acknowledgements
We wish to acknowledge gifts of cultures from several culture collections, viz. Prairie Regional Laboratory, Saskatoon, Canada; National Collection of Yeast Cultures, Nutfield, Surrey, London; National Collection of Industrial and Marine Bacteria Ltd. Aberdeen, Scotland and various other culture collections, Collections marked with an asterisk in the list of abbreviation which have donated the cultures. Special mention should be made of National Collection of Industrial and Marine Bacteria Ltd. Aberdeen, Scotland, for giving us nearly 350 cultures of bacteria as a free gift. Many of the references have been drawn from the NCIB Catalogue and permission from the Director of Torry Research Station to quote from their catalogue is gratefully acknowledged. We are also indebted to individuals who have generously supplied cultures to this collection.